'Sing' in the Bible

Then he consulted with the people and appointed some to sing for the Lord and some to praise the splendor of His holiness. When they went out in front of the armed forces, they kept singing:Give thanks to the Lord,for His faithful love endures forever.

And when they began to sing and to praise, the LORD set ambushments against the children of Ammon, Moab, and mount Seir, which were come against Judah; and they were smitten.

And she looked, and, behold, the king stood at his pillar at the entering in, and the princes and the trumpets by the king: and all the people of the land rejoiced, and sounded with trumpets, also the singers with instruments of musick, and such as taught to sing praise. Then Athaliah rent her clothes, and said, Treason, Treason.

Hezekiah ordered the burnt sacrifice to be offered on the altar. As they began to offer the sacrifice, they also began to sing to the Lord, accompanied by the trumpets and the musical instruments of King David of Israel.

Moreover Hezekiah the king and the princes commanded the Levites to sing praise unto the LORD with the words of David, and of Asaph the seer. And they sang praises with gladness, and they bowed their heads and worshipped.

Jeremiah composed laments for Josiah which all the male and female singers use to mourn Josiah to this very day. It has become customary in Israel to sing these; they are recorded in the Book of Laments.