Sunan Ibn Majah, Volume 4, Book 25, Hadith 3044 (DarusSalam) ⓘ
It was narrated from Ibn ‘Umar that the Messenger of Allah said: “May Allah have mercy on those who shave (their heads).” They said: “And those who cut (their hair), O Messenger of Allah!” He said: “May Allah have mercy on those who shave (their heads).” They said: “And those who cut (their hair), O Messenger of Allah!” He said: “May Allah have mercy on those who shave (their heads).” They said: “And those who cut (their hair), O Messenger of Allah!” He said: “And those who cut (their hair).”
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، وَأَحْمَدُ بْنُ أَبِي الْحَوَارِيِّ الدِّمَشْقِيُّ، قَالاَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ قَالَ " رَحِمَ اللَّهُ الْمُحَلِّقِينَ " . قَالُوا وَالْمُقَصِّرِينَ يَا رَسُولَ اللَّهِ قَالَ " رَحِمَ اللَّهُ الْمُحَلِّقِينَ " . قَالُوا وَالْمُقَصِّرِينَ يَا رَسُولَ اللَّهِ قَالَ " رَحِمَ اللَّهُ الْمُحَلِّقِينَ " . قَالُوا وَالْمُقَصِّرِينَ يَا رَسُولَ اللَّهِ قَالَ " وَالْمُقَصِّرِينَ " .
also referenced under: Hadith 3044 (Reference) & Book 25, Hadith 3160 (In-Book)