Sahih al-Bukhari
Sahih al-Bukhari 3033
قَالَ اللَّيْثُ حَدَّثَنِي عُقَيْلٌ، عَنِ ابْنِ شِهَابٍ، عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ أَنَّهُ قَالَ انْطَلَقَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَمَعَهُ أُبَىُّ بْنُ كَعْبٍ قِبَلَ ابْنِ صَيَّادٍ، فَحُدِّثَ بِهِ فِي نَخْلٍ، فَلَمَّا دَخَلَ عَلَيْهِ رَسُولُ اللَّهِ صلى الله عليه وسلم النَّخْلَ، طَفِقَ يَتَّقِي بِجُذُوعِ النَّخْلِ، وَابْنُ صَيَّادٍ فِي قَطِيفَةٍ لَهُ فِيهَا رَمْرَمَةٌ، فَرَأَتْ أُمُّ ابْنِ صَيَّادٍ رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَتْ يَا صَافِ، هَذَا مُحَمَّدٌ، فَوَثَبَ ابْنُ صَيَّادٍ، فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لَوْ تَرَكَتْهُ بَيَّنَ ".
Al-Layth said: 'Uqayl narrated to me from Ibn Shihab, from Salim ibn 'Abdullah, from 'Abdullah ibn 'Umar (may Allah be pleased with them both), who said: The Messenger of Allah (ﷺ) set out with Ubayy ibn Ka'b toward Ibn Sayyad. Word had reached him about Ibn Sayyad while he was among the date palms. When the Messenger of Allah (ﷺ) entered the grove, he began taking cover behind the trunks of the palms. Ibn Sayyad was under a covering garment, with a murmuring sound beneath it. Ibn Sayyad's mother saw the Messenger of Allah (ﷺ) and said, ‘O Safi, this is Muhammad.’ Ibn Sayyad sprang up, and the Messenger of Allah (ﷺ) said, ‘If she had left him, the matter would have become clear.’
Translation notes
وَابْنُ صَيَّادٍ فِي قَطِيفَةٍ لَهُ فِيهَا رَمْرَمَةٌ،
The word رمرمة denotes a low murmuring or rustling sound, but the source does not identify its cause.
Confirm that a neutral description of the sound is preferable to specifying its source.