Safiyyah bint Abi Ubaid says that once Sayyiduna Ibn Umar (may Allah be pleased with them both) saw a child whose head had some hair cut and some left as it was. He said: Do you not know that the Prophet (peace and blessings be upon him) forbade cutting children's hair in this manner?
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5846
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف لضعف عبدالله بن نافع.