(390) بَابُ الضَّرْبِ عَلَى اللَّحْنِ
Nafi' said, "Ibn 'Umar used to strike his son for making grammaticalmistakes."
Reference: Al-Adab Al-Mufrad 880
In-book reference: Book 37, Hadith 6
English translation: Book 37, Hadith 880