Musnad Abu Ya'la al-Mawsili 160:81

'Amr ibn Muhammad al-Naqid narrated to us, 'Isa ibn Yunus ibn Abi Ishaq al-Sabi'i narrated to us, Sulayman al-Taymi narrated to us, from Bakr ibn 'Abd Allah al-Muzani, from Abu Rafi', who said: I prayed the 'Isha prayer with Abu Hurayrah, and he recited "When the sky has split [Idha al-sama'u inshaqqat]." I asked him [about it], and he said: "Abu al-Qasim (peace be upon him) prostrated during it, and I was with him." Al-Taymi said, or he said: "I prostrated during it with Abu al-Qasim (may Allah bless him and grant him peace), so I shall not cease to prostrate during it until I meet Abu al-Qasim (may Allah bless him and grant him peace)."