'Duty' in the Bible
Judah said to Onan, "Go in to your brother's wife, and perform the duty of a husband's brother to her, and raise up seed to your brother."
and he said, "When you perform the duty of a midwife to the Hebrew women, and see them on the birth stool; if it is a son, then you shall kill him; but if it is a daughter, then she shall live."
The duty of the sons of Gershon in the Tent of Meeting shall be the tabernacle, and the tent, its covering, and the screen for the door of the Tent of Meeting,
Their duty shall be the ark, the table, the lamp stand, the altars, the vessels of the sanctuary with which they minister, and the screen, and all its service.
The appointed duty of the sons of Merari shall be the tabernacle's boards, its bars, its pillars, its sockets, all its instruments, all its service,
Those who encamp before the tabernacle eastward, in front of the Tent of Meeting toward the sunrise, shall be Moses, and Aaron and his sons, keeping the requirements of the sanctuary for the duty of the children of Israel. The stranger who comes near shall be put to death.
"The duty of Eleazar the son of Aaron the priest shall be the oil for the light, the sweet incense, the continual meal offering, and the anointing oil, the requirements of all the tabernacle, and of all that is in it, the sanctuary, and its furnishings."
At the commandment of Aaron and his sons shall be all the service of the sons of the Gershonites, in all their burden, and in all their service; and you shall appoint their duty to them in all their responsibilities.
This is the service of the families of the sons of the Gershonites in the Tent of Meeting: and their duty shall be under the hand of Ithamar the son of Aaron the priest.
This is the duty of their burden, according to all their service in the Tent of Meeting: the tabernacle's boards, its bars, its pillars, its sockets,
and the pillars of the court around it, and their sockets, and their pins, and their cords, with all their instruments, and with all their service: and by name you shall appoint the instruments of the duty of their burden.
but shall minister with their brothers in the Tent of Meeting, to perform the duty, and shall do no service. You shall do thus to the Levites concerning their duties."
They shall keep your commands, and the duty of all the Tent: only they shall not come near to the vessels of the sanctuary and to the altar, that they not die, neither they, nor you.
"You shall perform the duty of the sanctuary, and the duty of the altar; that there be wrath no more on the children of Israel.
Of the children of Israel's half, you shall take one drawn out of every fifty, of the persons, of the cattle, of the donkeys, and of the flocks, [even] of all the livestock, and give them to the Levites, who perform the duty of the tabernacle of Yahweh."
even of the children of Israel's half, Moses took one drawn out of every fifty, both of man and of animal, and gave them to the Levites, who performed the duty of the tabernacle of Yahweh; as Yahweh commanded Moses.
If brothers dwell together, and one of them die, and have no son, the wife of the dead shall not be married outside to a stranger: her husband's brother shall go in to her, and take her to him as wife, and perform the duty of a husband's brother to her.
If the man doesn't want to take his brother's wife, then his brother's wife shall go up to the gate to the elders, and say, "My husband's brother refuses to raise up to his brother a name in Israel; he will not perform the duty of a husband's brother to me."
You have not left your brothers these many days to this day, but have performed the duty of the commandment of Yahweh your God.
Barley also and straw for the horses and swift steeds brought they to the place where [the officers] were, every man according to his duty.
They lodged around the house of God, because that duty was on them; and to them pertained its opening morning by morning.
and that they should keep the duty of the Tent of Meeting, and the duty of the holy place, and the duty of the sons of Aaron their brothers, for the service of the house of Yahweh.
even as the duty of every day required, offering according to the commandment of Moses, on the Sabbaths, and on the new moons, and on the set feasts, three times in the year, [even] in the feast of unleavened bread, and in the feast of weeks, and in the feast of tents.
He appointed, according to the ordinance of David his father, the divisions of the priests to their service, and the Levites to their offices, to praise, and to minister before the priests, as the duty of every day required; the doorkeepers also by their divisions at every gate: for so had David the man of God commanded.
besides those who were reckoned by genealogy of males, from three years old and upward, even everyone who entered into the house of Yahweh, as the duty of every day required, for their service in their offices according to their divisions;
They kept the feast of tents, as it is written, and [offered] the daily burnt offerings by number, according to the ordinance, as the duty of every day required;
They performed the duty of their God, and the duty of the purification, and [so did] the singers and the porters, according to the commandment of David, and of Solomon his son.
This is the end of the matter. All has been heard. Fear God, and keep his commandments; for this is the whole duty of man.
He said to me, This room, whose prospect is toward the south, is for the priests, the keepers of the duty of the house;
and the room whose prospect is toward the north is for the priests, the keepers of the duty of the altar: these are the sons of Zadok, who from among the sons of Levi come near to Yahweh to minister to him.
You have not performed the duty of my holy things; but you have set performers of my duty in my sanctuary for yourselves.
Yet will I make them performers of the duty of the house, for all its service, and for all that shall be done therein.
But the priests the Levites, the sons of Zadok, who performed the duty of my sanctuary when the children of Israel went astray from me, they shall come near to me to minister to me; and they shall stand before me to offer to me the fat and the blood, says the Lord Yahweh:
Even so you also, when you have done all the things that are commanded you, say, 'We are unworthy servants. We have done our duty.'"
No soldier on duty entangles himself in the affairs of life, that he may please him who enrolled him as a soldier.