وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، أَنَّ سَعِيدَ بْنَ الْمُسَيَّبِ، قَالَ مَا تَرَوْنَ فِيمَنْ غَلَبَهُ الدَّمُ مِنْ رُعَافٍ فَلَمْ يَنْقَطِعْ عَنْهُ قَالَ مَالِكٌ قَالَ يَحْيَى بْنُ سَعِيدٍ ثُمَّ قَالَ سَعِيدُ بْنُ الْمُسَيَّبِ أَرَى أَنْ يُومِئَ بِرَأْسِهِ إِيمَاءً ‏.‏ قَالَ يَحْيَى قَالَ مَالِكٌ وَذَلِكَ أَحَبُّ مَا سَمِعْتُ إِلَىَّ فِي ذَلِكَ ‏.‏

Yahya related to me from Malik from Yahya ibn Said that Said ibnal-Musayyab was asked, "What do you say about someone who is afflictedby a nose-bleed which does not stop? "Malik said that Yahya ibn Saidsaid that Said ibn al Musayyab said, "I say that he should signal withhis head." (i.e. instead of doing sajda or ruku.) Yahya saidthat Malik said, "That is what I like most out of what I have heardabout the matter." Translation Not Available

Book Ref: Muwatta Imam Malik Book 2 Hadith 84
Web Ref:  Muwatta Imam Malik Book 2 Hadith 54