Surah Al-Imran, ayah 67

مَا كَانَ إِبۡرَٰهِيمُ يَهُودِيّٗا وَلَا نَصۡرَانِيّٗا وَلَٰكِن كَانَ حَنِيفٗا مُّسۡلِمٗا وَمَا كَانَ مِنَ ٱلۡمُشۡرِكِينَ ٦٧

Mā kāna ibrāhīmu yahūdiyyan walā nasrāniyyan walākin kāna hanīfam musliman wamā kāna minal-mushrikīn

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.¹²⁹