Exodus 34:20
But the firstling of an ass thou shalt ransom with a lamb; and if thou ransom it not, then shalt thou break its neck. All the first-born of thy sons thou shalt ransom; and none shall appear before me empty.
Exodus 23:15
Thou shalt keep the feast of unleavened bread, (thou shalt eat unleavened bread seven days, as I have commanded thee, in the time appointed of the month Abib; for in it thou camest out from Egypt; and none shall appear in my presence empty;)
Deuteronomy 16:16
Three times in the year shall all thy males appear before Jehovah thy God in the place which he will choose, at the feast of unleavened bread, and at the feast of weeks, and at the feast of tabernacles; and they shall not appear before Jehovah empty:
Exodus 13:15
And it came to pass, when Pharaoh stubbornly refused to let us go, that Jehovah slew all the firstborn in the land of Egypt, both the firstborn of men and the firstborn of cattle: therefore I sacrifice to Jehovah all that breaketh open the womb being males; and every firstborn of my children I ransom.
Exodus 13:13
And every firstling of an ass shalt thou ransom with a lamb; and if thou do not ransom it, thou shalt break its neck; and every firstborn of a man among thy sons shalt thou ransom.
Numbers 18:15
Everything that breaketh open the womb of all flesh, which they present to Jehovah, of men or of beasts, shall be thine; nevertheless the firstborn of man shalt thou in any case ransom, and the firstborn of unclean beasts shalt thou ransom.
Exodus 13:10
And thou shalt keep this ordinance at its set time from year to year.
Numbers 3:45-51
Take the Levites instead of all the firstborn among the children of Israel, and the cattle of the Levites instead of their cattle; and the Levites shall be mine: I am Jehovah.
1 Samuel 9:7-8
And Saul said to his servant, But if we go, what shall we bring the man? for the bread is spent in our vessels, and we have no present to give to the man of God: what have we?
2 Samuel 24:24
And the king said to Araunah, No; but I will in any case buy them of thee at a price: neither will I offer up to Jehovah my God burnt-offerings without cost. And David bought the threshing-floor and the oxen for fifty shekels of silver.