[٣٢٣/٤] الكافي: محمد بن يحيى وغيره، عن أحمد بن محمد بن عيسى، عن ابن أبي نصر، عن أبي الحسن الرضا عليه السلام قال: قال رسول الله صلى الله عليه وآله: لما اسري بي إلى السماء بلغ بي جبرئيل مكانا لم يطأه قط جبرئيل فكشف له فأراه الله من نور عظمته ما أحب
4. [4/323] al-Kafi: Muhammad b. Yahya and other than him from Ahmad b. Muhammad b. Isa from Ibn Abi Nasr from Abi al-Hasan al-Ridha عليه السلام who said: The Messenger of Allah صلى الله عليه وآله said:  When I was made to ascend to Heaven - Jibril led me to a place where Jibril had never tread on. (The Imam says:) It was then unveiled for him (the prophet) and Allah showed him of His Light of Grandeur what He wished. 