﴿ مَا كَانَ إِبْرَٰهِيمُ يَهُودِيًّۭا وَلَا نَصْرَانِيًّۭا وَلَٰكِن كَانَ حَنِيفًۭا مُّسْلِمًۭا وَمَا كَانَ مِنَ ٱلْمُشْرِكِينَ ﴾

“Abraham was neither a "Jew" nor a "Christian", but was one who turned away from all that is false, having surrendered himself unto God; and he was not of those who ascribe divinity to aught beside Him.”

Please check ayah 3:68 for complete tafsir.