(The sound conclusion is that it is a Companion-level report.) So it appears in al-Majmūʿ (3/70–71), where he adds:

“Our colleagues, too, have adduced weak ḥadiths; yet the position we rely on is that these missed prayers are debts a person owes. Therefore, keeping them in chronological order is not obligatory unless supported by an explicit proof, and they have produced no such proof. Besides, whoever performs them out of sequence has still carried out the prayer that was required of him, and no additional condition may be imposed without clear evidence. Allah knows best.”

6 – The Call to Prayer (Adhān)

1 – Before the adhān was legislated they merely summoned one another when the time for prayer arrived. This was first suggested by ʿUmar—may Allah be pleased with him— and the Prophet, peace and blessings be upon him, approved it.

ʿAbd Allah ibn ʿUmar—may Allah be pleased with them both—narrated:

“When the Muslims reached Medina they would gather and wait for the prayers, but no one made any call. One day they spoke about it. Some said, ‘Let us adopt a bell like the Christians’ bell,’ and others said, ‘Rather, a horn like the Jews’ horn.’ ʿUmar said, ‘Why do you not send a man to proclaim the prayer?’ The Messenger of Allah, peace and blessings be upon him, then said:

‘Bilāl, stand up and announce the prayer.’”

[Bukhārī, Muslim, al-Nasāʾī, al-Tirmidhī] and al-Tirmidhī declared it “good and sound without dispute,” 88; also recorded by Aḥmad (2/148). Ibn Jurayj said that Nāfiʿ informed him of it.

Al-Majmūʿ (3/76) states: “This summons was an invitation to the prayer; it was not yet the formal adhān, and it occurred before the adhān was prescribed.”