And that the Noble Prophet, peace and blessings be upon him, said: People will continue asking questions until they reach the point where they say, "Allah created us, but who created Allah?" Hazrat Abu Hurairah, may Allah be pleased with him, says: By Allah, one day I was sitting when an Iraqi man came and said, "Allah created us, but who created Allah?" Upon hearing his question, I put my fingers in my ears and shouted loudly, "Allah and His Messenger, peace and blessings be upon him, have spoken the absolute truth. Allah is One and Self-Sufficient. He did not beget, nor was He begotten, and there is none comparable to Him."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 9027