Sunan Ibn Majah #3045 · Chapters on Hajj Rituals

Sunan Ibn MajahIt was narrated that Ibn ‘Abbas said
Sunan Ibn Majah · Book 25 · Chapters on Hajj Rituals
Sunan Ibn Majah · كتاب 25 · كتاب المناسك
“It was said: ‘O Messenger of Allah, why did you support (by supplicating for) those who shave (their heads) three times and those who cut (their hair) only once?’ He said: ‘Because they did not entertain any doubts.’”
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، حَدَّثَنَا يُونُسُ بْنُ بُكَيْرٍ، حَدَّثَنَا ابْنُ إِسْحَاقَ، حَدَّثَنَا ابْنُ أَبِي نَجِيحٍ، عَنْ مُجَاهِدٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قِيلَ يَا رَسُولَ اللَّهِ لِمَ ظَاهَرْتَ لِلْمُحَلِّقِينَ ثَلاَثًا وَلِلْمُقَصِّرِينَ وَاحِدَةً قَالَ ‏
"‏ إِنَّهُمْ لَمْ يَشُكُّوا ‏"‏ ‏.‏
Reference : Sunan Ibn Majah 3045In-book reference : Book 25, Hadith 164