Quran 3:68 — The Amramites (Ali-'Imran)

The people most worthy of Abraham are those who followed him, and this prophet, and those who believe. GOD is the Lord and Master of the believers.

[3:67] Abraham was neither Jewish, nor Christian; he was a monotheist submitter. He never was an idol worshiper.

[3:69] Some followers of the scripture wish to lead you astray, but they only lead themselves astray, without perceiving.