[Art] not thou our God, [who] didst drive out the inhabitants of this land before thy people Israel, and gavest it to the seed of Abraham thy friend for ever? (20:7)

--Isaiah--

But thou, Israel, [art] my servant, Jacob whom I have chosen, the seed of Abraham my friend. (41:8)

--James--

And the scripture was fulfilled which saith, Abraham believed God, and it was imputed unto him for righteousness: and he was called the Friend of God. (2:23)