How could Abu Bakr, may Allah be pleased with him, be among the first Muhajireen led in prayer by Salim, the freed slave of Abu Hudhayfah, in Quba Mosque, when he was the one who emigrated with the Messenger of Allah, peace and blessings be upon him, from Makkah?

Al-Hafiz Ibn Hajar responded to the question of Salim, the mawla of Abu Hudhayfah, leading the emigrants in prayer, including Abu Bakr, by stating that it is probable that Abu Bakr prayed behind Salim in Quba after the Hijra and before the construction of the Prophet's Mosque, when Abu Bakr arrived in Quba.