Sunan an-Nasa'i 5051
سنن النسائي#5051SahihIt was narrated that Ibn 'Umar said:"The Messenger of Allah [SAW] forbade Al-Qaza' (to shave part of the head and leave part)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 48:12