Quran

 3:67

مَا كَانَ إِبْرَاهِيمُ يَهُودِيًّا وَلَا نَصْرَانِيًّا وَلَٰكِنْ كَانَ حَنِيفًا مُسْلِمًا وَمَا كَانَ مِنَ الْمُشْرِكِينَ ﴿٦٧﴾

67. Abraham was neither a Jew nor a Christian, but he was a Monotheist, a Muslim. And he was not of the associators.