سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 5057
The Book of Adornment
Combing the Hair Every Other Day
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا بِشْرٌ، عَنْ يُونُسَ، عَنِ الْحَسَنِ، وَمُحَمَّدٍ، قَالاَ التَّرَجُّلُ غِبٌّ .
It was narrated that Al-Hasan and Muhammad said: "Combing one's hair (should be done) every other day."
Sunan an-Nasa'i, 5057Da'if (Darussalam)