Beginning of Creation
59/7. Chapter:
If anyone says Amin [during the Salat (prayer) at the end of the recitation of Surat Al-Fatiha]
Sahih Bukhari
حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، حَدَّثَنَا شُعْبَةُ، عَنِ الأَعْمَشِ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ ـ رضى الله عنه – {لَقَدْ رَأَى مِنْ آيَاتِ رَبِّهِ الْكُبْرَى} قَالَ رَأَى رَفْرَفًا أَخْضَرَ سَدَّ أُفُقَ السَّمَاءِ.
Narrated `Abdullah: Regarding the Verse: "Indeed he (Muhammad) did see. Of the Signs of his Lord, The Greatest!" (53.18) That the Prophet (ﷺ) had seen a green carpet spread all over the horizon of the sky.
Reference : Sahih al-Bukhari 3233In-book reference : Book 59, Hadith 44USC-MSA web (English) reference : Vol. 4, Book 54, Hadith 456