Quran 3:67 — The Amramites (Ali-'Imran)

ما كانَ إِبرٰهيمُ يَهودِيًّا وَلا نَصرانِيًّا وَلٰكِن كانَ حَنيفًا مُسلِمًا وَما كانَ مِنَ المُشرِكينَ

Abraham was neither Jewish, nor Christian; he was a monotheist submitter. He never was an idol worshiper.

[3:66] You have argued about things you knew; why do you argue about things you do not know? GOD knows, while you do not know.

[3:68] 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.