(121) بَابُ مَا لا يَجُوزُ مِنَ اللَّعِبِ وَالْمُزَاحِ
'Abdullah ibn as-Sa'ib reported that his grandfather said, "I heardthe Messenger of Allah, may Allah bless him and grant him peace, say, 'Noneof you should take the goods of his companion, either in jest or seriously.When one of you takes his companion's staff, he should return it to him.'"
Reference: Al-Adab Al-Mufrad 241
In-book reference: Book 12, Hadith 4
English translation: Book 12, Hadith 241