I ask you this just of curiosity: isn't it known what Surah (chapter) or Ayah (verse) the Prophet, sallallaahu ‘alayhi wa sallam, read when he led the other prophets in prayer at Al-Masjid Al-Aqsa during Al-Mi'raaj (the Ascension)?

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.

After an extensive search, we have not come across what the Prophet, sallallaahu ‘alayhi wa sallam, recited the day he led the prophets, may Allaah exalt their mention, in the prayer in Al-Aqsa mosque in Jerusalem.

Allaah knows best.