Narrated Samurah ibn Jundub:

The Prophet ﷺ said: A boy is in pledge for his Aqiqah. Sacrifice is made for him on the seventh day, his head is shaved and is smeared with blood.

When Qatadah was asked about smearing with blood, how that should be done, he said: When you cut the head (i.e. throat) of the animal (meant for Aqiqah), you may take a few hair of it, place them on its veins, and then place them in the middle of the head of the infant, so that the blood flows on the hair (of the infant) like a threat. Then its head may be washed and shaved off.

Abu Dawud said: In narrating the word "is smeared with blood" (yudamma) there is a misunderstanding on the part of Hammam.

Abu Dawud said: Hammam has been opposed in narrating the words "is smeared with blood". This is misunderstanding of Hammam. They narrated he word "he is given a name (yusamma) and Hammam narrated it "is smeared with blood" (yudamma).

Abu Dawud said: This tradition is not followed.

حَدَّثَنَا حَفْصُ بْنُ عُمَرَ النَّمَرِيُّ، حَدَّثَنَا هَمَّامٌ، حَدَّثَنَا قَتَادَةُ، عَنِ الْحَسَنِ، عَنْ سَمُرَةَ، عَنْ رَسُولِ اللَّهِ ﷺ قَالَ " كُلُّ غُلاَمٍ رَهِينَةٌ بِعَقِيقَتِهِ تُذْبَحُ عَنْهُ يَوْمَ السَّابِعِ وَيُحْلَقُ رَأْسُهُ وَيُدَمَّى " . فَكَانَ قَتَادَةُ إِذَا سُئِلَ عَنِ الدَّمِ كَيْفَ يُصْنَعُ بِهِ قَالَ إِذَا ذَبَحْتَ الْعَقِيقَةَ أَخَذْتَ مِنْهَا صُوفَةً وَاسْتَقْبَلْتَ بِهِ أَوْدَاجَهَا ثُمَّ تُوضَعُ عَلَى يَافُوخِ الصَّبِيِّ حَتَّى يَسِيلَ عَلَى رَأْسِهِ مِثْلُ الْخَيْطِ ثُمَّ يُغْسَلُ رَأْسُهُ بَعْدُ وَيُحْلَقُ . قَالَ أَبُو دَاوُدَ وَهَذَا وَهَمٌ مِنْ هَمَّامٍ " وَيُدَمَّى " . قَالَ أَبُو دَاوُدَ خُولِفَ هَمَّامٌ فِي هَذَا الْكَلاَمِ وَهُوَ وَهَمٌ مِنْ هَمَّامٍ وَإِنَّمَا قَالُوا " يُسَمَّى " . فَقَالَ هَمَّامٌ " يُدَمَّى " . قَالَ أَبُو دَاوُدَ وَلَيْسَ يُؤْخَذُ بِهَذَا .