حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَكْرَهُ لُبْسَ الْمِنْطَقَةِ لِلْمُحْرِمِ ‏.‏

Yahya related to me from Malik from Nafi that 'Abdullah ibn 'Umarused to disapprove of anybody wearing a belt or girdle while in ihram. Translation Not Available

Book Ref: Muwatta Imam Malik Book 20 Hadith 719
Web Ref:  Muwatta Imam Malik Book 20 Hadith 12