In Islam, we believe everyone is born to believe in their Creator. It is those they are with example family, relatives, who they brought up with that make them. Here are a few verses from the Quran that Allah talks about Ibraheem alayhi salam.(means and on him peace)
Surely, Ibrahim (Abraham) was a nation, (i.e. a leader) devout to Allah, unswervingly upright, and he was not of the associators, (Those who associate others with Allah) AnNahl:16:120
- Allah sent His Prophet Ibraaheem pbuh and ordained among his offspring Prophethood and the Book (al-‘Ankaboot 29:27)
- “And mention in the Book (the Quran) Ibraaheem (Abraham). Verily, he was a man of truth, a Prophet [Maryam 19:41)
- “And We bestowed upon him Ishaaq (Isaac) and Ya‘qoob (Jacob), each of them We guided, and before him, We guided Nooh (Noah), and among his progeny Dawood (David), Sulaymaan (Solomon), Ayyoob (Job), Yoosuf (Joseph), Moosa (Moses), and Haaroon (Aaron). Thus do We reward Al-Muhsinoon (the good-doers).And Zakariyya (Zachariya), and Yahya (John) and ‘Eesa (Jesus) and Ilyaas (Elias), each one of them was of the righteous. And Isma‘eel (Ishmael) and Al-Yasaa‘ (Elisha), and Yoonus (Jonah) and Loot (Lot), and each one of them We preferred above the ‘Aalameen [mankind and jinn (of their times)]” al-An’aam 6:84-86
- “And (remember) Ibraaheem (Abraham) when he said to his people: ‘Worship Allah (Alone), and fear Him: that is better for you if you did but know. You worship besides Allah only idols, and you only invent falsehood. Verily, those whom you worship besides Allah have no power to give you provision, so seek your provision from Allah (Alone), and worship Him (Alone), and be grateful to Him. To Him (Alone) you will be brought back’”[al-‘Ankaboot 29:16-17]
There are more verses but these are some of the ones that show his monotheistic belief.