Muwatta Malik 158
موطأ مالك#158SahihThese are the words of a Successor — the generation after the Companions — not of the Prophet ﷺ.
وَحَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، أَنَّ أَبَاهُ، قَالَ لَهُ إِذَا كُنْتَ فِي سَفَرٍ فَإِنْ شِئْتَ أَنْ تُؤَذِّنَ وَتُقِيمَ فَعَلْتَ وَإِنْ شِئْتَ فَأَقِمْ وَلاَ تُؤَذِّنْ . قَالَ يَحْيَى سَمِعْتُ مَالِكًا يَقُولُ لاَ بَأْسَ أَنْ يُؤَذِّنَ الرَّجُلُ وَهُوَ رَاكِبٌ .
Yahya related to me from Malik from Hisham ibn Urwa that his father said to him, "When you are on a journey you can, if you wish, call the adhan and the iqama, or, if you wish, the iqama and not the adhan." Yahya said that he heard Malik say, "There is no harm in a man calling the adhan while riding
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 3:13