(a) It is narrated from Sufyan (may Allah have mercy on him) that he narrated it with the same chain and with the same meaning, except that he did not mention the words 'Ibnu 'ammin li' (a cousin of mine). (b) The hadith of Sayyiduna Abu Juhayfah (may Allah be pleased with him) has already passed in earlier chapters, mentioning Sayyiduna Bilal (may Allah be pleased with him) giving the adhan at al-Abtah. In the narration of Sayyiduna Abu Qatadah (may Allah be pleased with him), Sayyiduna Bilal (may Allah be pleased with him) gave the adhan on the return from Khaybar. And later, if Allah wills, in the issue of delaying the Zuhr prayer until it cools, we will establish from the hadith of Sayyiduna Abu Dharr (may Allah be pleased with him) that giving the adhan and the iqamah while travelling is a sunnah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 1943