That Ibn 'Umar said: "When the Messenger of Allah ﷺ would wear an 'Imamah would hang between his shoulders." Nafi' said: "Ibn 'Umar would hang his 'Imamah between his shoulders." 'Ubaidullah said: "And I saw Al-Qasim and Salim doing that."  

كَانَ النَّبِيُّ ﷺ إِذَا اعْتَمَّ سَدَلَ عِمَامَتَهُ بَيْنَ كَتِفَيْهِ قَالَ نَافِعٌ وَكَانَ ابْنُ عُمَرَ يَسْدِلُ عِمَامَتَهُ بَيْنَ كَتِفَيْهِ قَالَ عُبَيْدُ اللَّهِ وَرَأَيْتُ الْقَاسِمَ وَسَالِمًا يَفْعَلاَنِ ذَلِكَ