New Revised Standard Version
The people of Israel who were present at Jerusalem kept the festival of unleavened bread seven days with great gladness; and the Levites and the priests praised the LORD day by day, accompanied by loud instruments for the LORD.

Contemporary English Version
The worshipers in Jerusalem were very happy and celebrated the Festival for seven days. The Levites and priests sang praises to the LORD every day and played their instruments.

New American Bible
Thus the Israelites who were in Jerusalem celebrated the feast of Unleavened Bread with great rejoicing for seven days, and the Levites and the priests sang the praises of the LORD day after day with all their strength.

Douay-Rheims Bible
And the children of Israel, that were found at Jerusalem, kept the feast of unleavened bread seven days with great joy, praising the Lord every day. the Levites also, and the priests, with instruments that agreed to their office.

And the children of Israel, that were found at Jerusalem, kept the feast of unleavened bread seven days with great joy, praising the Lord every day. the Levites also, and the priests, with instruments that agreed to their office.

present [heb] found

Exodus 12:15 Seven days shall you eat unleavened bread: in the first day there shall be no leaven in your houses; whosoever shall eat any thing leavened, from the first day until the seventh day, that soul shall perish out of Israel.

Exodus 13:6 Seven days shalt thou eat unleavened bread: and on the seventh day shall be the solemnity of the Lord.

Leviticus 23:6 And the fifteenth day of the same month is the solemnity of the unleavened bread of the Lord. Seven days shall you eat unleavened bread.

Luke 22:1,7 Now the feast of unleavened bread, which is called the pasch, was at hand. . . .

1 Corinthians 5:7,8 Purge out the old leaven, that you may be a new paste, as you are unleavened. For Christ our pasch is sacrificed. . . .

great gladness

2 Chronicles 30:26 And there was a great solemnity in Jerusalem, such as had not been in that city since the time of Solomon the son of David king of Israel.

2 Chronicles 7:10 So on the three and twentieth day of the seventh month he sent away the people to their dwellings, joyful and glad for the good that the Lord had done to David, and to Solomon, and to all Israel his people.

Deuteronomy 12:7,12 And you shall eat there in the sight of the Lord your God: and you shall rejoice in all things, whereunto you shall put your hand, you and your houses wherein the Lord your God hath blessed you. . . .

Deuteronomy 16:14 And thou shalt make merry in thy festival time, thou, thy son, and thy daughter, thy manservant, and thy maidservant, the Levite also and the stranger, and the fatherless and the widow that are within thy gates.

Nehemiah 8:10 And he said to them: Go, eat fat meats, and drink sweet wine, and send portions to them that have not prepared for themselves: because it is the holy day of the Lord, and be not sad: for the joy of the Lord is our strength.

Acts 2:46 And continuing daily with one accord in the temple and breaking bread from house to house, they took their meat with gladness and simplicity of heart:

Philippians 4:4 Rejoice in the Lord always: again, I say, rejoice.

the priests

2 Chronicles 20:21 And he gave counsel to the people, and appointed the singing men of the Lord, to praise him by their companies, and to go before the army, and with one voice to say: Give glory to the Lord, for his mercy endureth for ever.

2 Chronicles 29:25-27 And he set the Levites in the house of the Lord with cymbals, and psalteries, and harps according to the regulation of David the king, and of Gad the seer, and of Nathan the prophet: for it was the commandment of the Lord by the hand of his prophets. . . .

Psalm 150:3-5 Praise him with the sound of trumpet: praise him with psaltery and harp. . . .