No one transmitted this report from al-Layth except Qutaybah. It was taken from him by Abū Dāwūd and al-Tirmidhī, whereas al-Nasāʾī declined to include it because he deemed it objectionable.
Musallam ibn Muḥammad informed us in his book; Abū al-Yaman al-Kindī informed us; al-Qazzāz informed us; Abū Bakr al-Khaṭīb informed us; Muḥammad ibn Aḥmad informed us; Muḥammad ibn Nuʿaym al-Ḍabbī informed us; Muḥammad ibn Muḥammad ibn Yaḥyā al-Isfarāʾīnī the jurist told me; Muḥammad ibn ʿAbdak ibn Mahdī al-Isfarāʾīnī narrated to us; Isḥāq ibn Abī ʿImrān al-Shāfiʿī narrated to us; Abū Muḥammad al-Marwazī—the scribe of Maḥmūd ibn Ghaylān—narrated to us; Yaḥyā ibn Yaḥyā al-Naysābūrī narrated to us; ʿAlī ibn al-Madīnī narrated to us; Aḥmad ibn Ḥanbal narrated to us; al-Layth narrated to us, from Yazīd ibn Abī Ḥabīb, from Abū al-Ṭufayl, from Muʿādh: that the Prophet ﷺ set out on the Tabūk campaign and would delay the noon prayer until the time of the afternoon prayer arrived, then combine the two. (Abridged.)
Aḥmad also recorded it in his Musnad, reaching us in a matching isnād that descends by six levels.
One of the remarkable points is that Abū ʿĪsā al-Tirmidhī narrated it from Qutaybah (1) with a shortened chain, as found in several manuscripts, saying:
“ʿAbd al-Ṣamad ibn Sulaymān al-Balkhī narrated to us, from Zakariyyā ibn Yaḥyā al-Luʾluʾī (2), from Abū Bakr al-Aʿyan, from ʿAlī ibn al-Madīnī, from Aḥmad, from Qutaybah.” This is one of the routes of descents (ṭuruq al-nawāzil).
Abū ʿAbd Allāh al-Ḥākim said: “Its transmitters are leading, trustworthy authorities, yet the chain of transmission and the matn are both anomalous, and we can find no defect by which to criticise it. Had al-Layth possessed the ḥadīth from Abū al-Zubayr…”