Philippians 2:6-7; 2 Corinthians 8:9

6 who, though he was in the form of God, did not regard equality with God as something to be exploited,

7 but emptied himself, taking the form of a slave, being born in human likeness. And being found in human form,

9 For you know the generous act of our Lord Jesus Christ, that though he was rich, yet for your sakes he became poor, so that by his poverty you might become rich.