Sahih al-Bukhari 1078

Musaddad narrated to us; he said: Mu‘tamir narrated to us; he said: I heard my father say: Bakr narrated to me, from Abu Rafi‘, who said: I prayed the night prayer with Abu Hurayrah, and he recited ‘When the sky is split open’ and prostrated. I said: ‘What is this?’ He said: ‘I prostrated during it behind Abu al-Qasim (peace and blessings be upon him), and I will keep prostrating during it until I meet him.’