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suyuti:687-72bAbū Ṣālḥ a freed slave of Liṭalḥah b. ʿAbdullāh
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السيوطي:٦٨٧-٧٢b

"عَنْ أَبِي صَالحٍ مَوْلًى لِطَلْحَةَ بْنِ عَبْدِ اللهِ قَالَ: كُنْتُ عِنْدَ أُمِّ سَلَمَةَ زَوْجِ النَّبِيِّ ﷺ فَأَتَاهَا ذُو قَرَابَةٍ لَهَا، فَقَامَ يُصَلِّي، فَلَمَّا ذَهَبَ يَسْجُدُ نَفَخَ فَقُلْتُ: لَا تَفْعَلْ فَإِنَّ رَسُولَ اللهِ ﷺ كَانَ يَقُولُ لِغُلامٍ أَسْوَدَ: يَا رَبَاحُ تَرِبَ وَجْهُكَ".  

[كر] ابن عساكر في تاريخه

See similar narrations below:

Collected by Ibn Ḥibbān

ذِكْرُ الْأَمْرِ أَنْ يَقْصِدَ الْمَرْءُ فِي سُجُودِهِ التُّرَابَ، إِذِ اسْتِعْمَالُهُ يُؤَدِّي إِلَى التَّوَاضُعِ لِلَّهِ جَلَّ وَعَلَا

ibnhibban:1913Aḥmad b. Muḥammad b. Yaḥyá al-Shaḥḥām Bi-al-Rrī > Muḥammad b. Muslim b. Wārah > al-Rabīʿ b. Rawḥ > Muḥammad b. Ḥarb > al-Zubaydī > ʿAdī b. ʿAbd al-Raḥman > Dāwud b. Abū Hind > Abū Ṣāliḥ a freed slave of Āl Ṭalḥah b. ʿUbaydullāh

[Machine] I was at Umm Salamah, the wife of the Prophet ﷺ, when someone from her relatives brought a young boy who had a mark on his face. He stood up to pray, and when he went to prostrate, he blew. Umm Salamah told him not to do that, for the Messenger of Allah ﷺ used to say to a young boy with a similar mark on his face, "O Rabah! Beautify your face."  

ابن حبّان:١٩١٣أَخْبَرَنَا أَحْمَدُ بْنُ مُحَمَّدِ بْنِ يَحْيَى الشَّحَّامُ بِالرِّيِّ حَدَّثَنَا مُحَمَّدُ بْنُ مُسْلِمِ بْنِ وَارَةَ حَدَّثَنَا الرَّبِيعُ بْنُ رَوْحٍ حَدَّثَنَا مُحَمَّدُ بْنُ حَرْبٍ عَنِ الزُّبَيْدِيِّ عَنْ عَدِيِّ بْنِ عَبْدِ الرَّحْمَنِ عَنْ دَاوُدَ بْنِ أَبِي هِنْدَ عَنْ أَبِي صَالِحٍ مَوْلَى آلِ طَلْحَةَ بْنِ عُبَيْدِ اللَّهِ قَالَ

كُنْتُ عِنْدَ أُمِّ سَلَمَةَ زَوْجِ النَّبِيِّ ﷺ فَأَتَاهَا ذُو قَرَابَتِهَا غُلَامٌ شَابٌّ ذُو جُمَّةٍ فَقَامَ يُصَلِّي فَلَمَّا ذَهَبَ لِيَسْجُدَ نَفَخَ فَقَالَتْ لَا تَفْعَلْ فَإِنَّ رَسُولَ اللَّهِ ﷺ كَانَ يَقُولُ لِغُلَامٍ لَنَا أَسْوَدَ «يَا رَبَاحُ تَرِّبْ وَجْهَكَ»