'Forever' in the Bible

They sang one to another in praising and giving thanks to Yahweh, "For he is good, for his loving kindness endures forever toward Israel." All the people shouted with a great shout, when they praised Yahweh, because the foundation of the house of Yahweh was laid.

Now therefore don't give your daughters to their sons, neither take their daughters to your sons, nor seek their peace or their prosperity forever; that you may be strong, and eat the good of the land, and leave it for an inheritance to your children forever.'