'Changed' in the Bible

{A Psalm of David, when he changed his behaviour before Abimelech; who drove him away, and he departed.} I will bless the LORD at all times: his praise shall continually be in my mouth.

They shall perish, but thou shalt endure: yea, all of them shall wax old like a garment; as a vesture shalt thou change them, and they shall be changed:

Thus they changed their glory into the similitude of an ox that eateth grass.