The day
Acts 20:16 For Paul had decided to sail past Ephesus so that he would not have to spend time in Asia; for he was hurrying to be in Jerusalem, if possible, on the day of Pentecost.
Exodus 23:16 Also you shall observe the Feast of the Harvest of the first fruits of your labors from what you sow in the field; also the Feast of the Ingathering at the end of the year when you gather in the fruit of your labors from the field.
Exodus 34:22 You shall celebrate the Feast of Weeks, that is, the first fruits of the wheat harvest, and the Feast of Ingathering at the turn of the year.
Leviticus 23:15 ‘You shall also count for yourselves from the day after the sabbath, from the day when you brought in the sheaf of the wave offering; there shall be seven complete sabbaths.
Numbers 28:16 ‘Then on the fourteenth day of the first month shall be the Lord’s Passover.
Deuteronomy 16:9 “You shall count seven weeks for yourself; you shall begin to count seven weeks from the time you begin to put the sickle to the standing grain.
They
Acts 2:46 Day by day continuing with one mind in the temple, and breaking bread from house to house, they were taking their meals together with gladness and sincerity of heart,
Acts 1:13 When they had entered the city, they went up to the upper room where they were staying; that is, Peter and John and James and Andrew, Philip and Thomas, Bartholomew and Matthew, James the son of Alphaeus, and Simon the Zealot, and Judas the son of James.
Acts 4:24 And when they heard this, they lifted their voices to God with one accord and said, “O Lord, it is You who made the heaven and the earth and the sea, and all that is in them,
Acts 5:12 At the hands of the apostles many signs and wonders were taking place among the people; and they were all with one accord in Solomon’s portico.
2 Chronicles 5:13 in unison when the trumpeters and the singers were to make themselves heard with one voice to praise and to glorify the Lord, and when they lifted up their voice accompanied by trumpets and cymbals and instruments of music, and when they praised the Lord saying, “He indeed is good for His lovingkindness is everlasting,” then the house, the house of the Lord, was filled with a cloud,
2 Chronicles 30:12 The hand of God was also on Judah to give them one heart to do what the king and the princes commanded by the word of the Lord.
Psalm 133:1 A Song of Ascents, of David.
Behold, how good and how pleasant it is
For brothers to dwell together in unity!
Jeremiah 32:39 and I will give them one heart and one way, that they may fear Me always, for their own good and for the good of their children after them.
Zephaniah 3:9 “For then I will give to the peoples purified lips,
That all of them may call on the name of the Lord,
To serve Him shoulder to shoulder.
Romans 15:6 so that with one accord you may with one voice glorify the God and Father of our Lord Jesus Christ.
Philippians 1:27 Only conduct yourselves in a manner worthy of the gospel of Christ, so that whether I come and see you or remain absent, I will hear of you that you are standing firm in one spirit, with one mind striving together for the faith of the gospel;
Philippians 2:2 make my joy complete by being of the same mind, maintaining the same love, united in spirit, intent on one purpose.
General references
Exodus 36:10 He joined five curtains to one another and the other five curtains he joined to one another.
Leviticus 8:3 and assemble all the congregation at the doorway of the tent of meeting.”
Leviticus 23:16 You shall count fifty days to the day after the seventh sabbath; then you shall present a new grain offering to the Lord.
Deuteronomy 16:9 “You shall count seven weeks for yourself; you shall begin to count seven weeks from the time you begin to put the sickle to the standing grain.