everyone who remained in Mecca was under ʿAttāb’s command. Likewise, when he sent Khālid ibn al-Walīd and other commanders of detachments, whoever went out with a commander was under that commander’s authority by virtue of his own choice to go out with him—not because (1) the Prophet—peace and blessings be upon him—had individually designated everyone accompanying the commander to go out with him. Nothing of this sort was the practice of the Prophet—peace and blessings be upon him—or even that of Abū Bakr.
This (2) is analogous to a regularly appointed imam who leads a congregation in prayer during his lifetime: whoever prays behind him has that imam as his own imam, and the imam takes precedence over him even if the follower is superior to him.
In Sahīh Muslim [and elsewhere] (3), Abū Masʿūd al-Badrī relates that the Prophet—peace and blessings be upon him—said:
“The people should be led in prayer by the one most proficient in reciting the Book of Allah. If they are equal in recitation, then by the one most knowledgeable about the Sunnah. If they are equal in knowledge of the Sunnah, then by the one who emigrated earliest. If they are equal in emigration, then by the eldest. No man shall lead [another man] (4) in prayer within the latter’s domain, nor sit in his place of honor except with his permission.” (5)
Thus, the Prophet—peace and blessings be upon him—forbade anyone from taking precedence over an imam vested with authority (6), even if the follower was superior to him.