Muwatta Malik, Book 20, Hadith 719 (In-Book) ⓘ
Yahya related to me from Malik from Nafi that 'Abdullah ibn 'Umar used to disapprove of anybody wearing a belt or girdle while in ihram.
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَكْرَهُ لُبْسَ الْمِنْطَقَةِ لِلْمُحْرِمِ .
also referenced under: Book 20, Hadith 12 (USC-MSA)