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." (JA)
English reference (JA): Vol. 4, Book 32, Hadith 3637 (JA)
Arabic reference (JA): Book 32, Hadith 3768 (JA)