He also reported God’s messenger as saying, “People will continue to ask one another questions till someone says this, ‘God created all things, but who created God?’ Whoever comes across anything of that nature should say, ‘I believe in God and in His messengers.’ ” (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب الإيمان / 66
Hadith Gradingالألبانی:متفق عليه | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (7296 مختصرًا بذکر إبليس لعنه الله) و مسلم (213، 212/ 134)»