It wasnarrated from Nafi' that Ibn 'Umar said:
"The Messenger ofAllah (ﷺ) forbade Qaza'." He (Nafi') said: "What is Qaza'?"He said:"It means shaving part of a child's head and leavinganother part." (FR)
English reference (FR): Vol. 4, Book 32, Hadith 3637 (FR)
Arabic reference (FR): Book 32, Hadith 3768 (FR)