Quran Ali 'Imran 3:67
مَا كَانَ إِبۡرَٰهِيمُ يَهُودِيّٗا وَلَا نَصۡرَانِيّٗا وَلَٰكِن كَانَ حَنِيفٗا مُّسۡلِمٗا وَمَا كَانَ مِنَ ٱلۡمُشۡرِكِينَ ٦٧
Translation
Abraham was neither a Jew nor a Christian, but he was one inclining toward truth, a Muslim [submitting to Allāh]. And he was not of the polytheists.