'Everlasting' in the Bible

Look, I am building a house for the name of Yahweh my God to dedicate to him, to offer sweet spices of incense before him, and [for] the regular rows [of bread], and burnt offerings for mornings, evenings, Sabbaths, and new moon festivals, and for appointed feasts of Yahweh our God which [are] everlasting for Israel.

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,

All the sons of Israel, seeing the fire come down and the glory of the Lord upon the house, bowed down on the pavement with their faces to the ground, and they worshiped and gave praise to the Lord, saying, “Truly He is good, truly His lovingkindness is everlasting.”

The priests stood at their posts, and the Levites also, with the instruments of music to the Lord, which King David had made for giving praise to the Lord—“for His lovingkindness is everlasting”—whenever he gave praise by their means, while the priests on the other side blew trumpets; and all Israel was standing.

When he had consulted with the people, he appointed those who sang to the Lord and those who praised Him in holy attire, as they went out before the army and said, “Give thanks to the Lord, for His lovingkindness is everlasting.”