None remains of those who prayed facing both Qiblas (that is, Jerusalem and Mecca) except myself.
Sahih al-Bukhari Book 65, Hadith 16
← Previous Hadith While some people were offering Fajr prayer in the Quba' mosque, some-one came and said, "Allah has revealed to the Prophet (ﷺ) Qur'anic instructions that you should face the Ka`ba (while praying) so you too, should face it." Those people then turned towards the Ka`ba.

Sahih al-Bukhari Book 65, Hadith 15 Next Hadith → While some people were offering morning prayer at Quba' a man came to them and said, "A Qur'anic Order has been revealed to Allah's Messenger (ﷺ) tonight that he should face the Ka`ba at Mecca (in prayer), so you too should turn your faces towards it." At that moment their faces were towards Sham (i.e. Jerusalem) (and on hearing that) they turned towards the Ka`ba (at Mecca).

Sahih al-Bukhari Book 65, Hadith 17