حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ أَبِي جَعْفَرٍ الْقَارِئِ، أَنَّهُ قَالَ رَأَيْتُ عَبْدَ اللَّهِ بْنَ عُمَرَ إِذَا أَهْوَى لِيَسْجُدَ مَسَحَ الْحَصْبَاءَ لِمَوْضِعِ جَبْهَتِهِ مَسْحًا خَفِيفًا ‏.‏

Yahya related to me from Malik that Abu Jafar al-Qari said, "Isaw Abdullah ibn Umar quickly brush away the small stones from theplace where he was going to put his forehead as he was going down intosajda." Translation Not Available

Book Ref: Muwatta Imam Malik Book 9 Hadith 376
Web Ref:  Muwatta Imam Malik Book 9 Hadith 45

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