He had prayed toward both qiblahs with the Messenger of Allah ﷺ. He said, I heard the Messenger of Allah ﷺ say, "Allah will continue to plant new servants in this religion, employing them in His obedience."
حدثنا أبو عبد الله قال حدثنا هشام بن عمار حدثنا الجراح بن مليح حدثنا بكر بن زرعة قال
وكان قد صلى القبلتين مع رسول الله ﷺ قال سمعت رسول الله ﷺ يقول لا يزال الله يغرس في هذا الدين غرسا يستعملهم في طاعته
[Its isnad is hasan] Ahmad reported it in 4/200 from Haytham bin Kharija from Jarrah with this wording. Ibn Hibban graded it sahih (Mawarid), no. 88, and Busiri said, "This is a sahih isnad."