983. hadíth
وَ قَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: «يَنْبَغِي لِلْمُتَمَتِّعِ «بِالْعُمْرَةِ إِلَى اَلْحَجِّ» إِذَا أَحَلَّ أَنْ لاَ يَلْبَسَ قَمِيصاً وَ أَنْ يَتَشَبَّهَ بِالْمُحْرِمِينَ ».
Imam Jafar ibn Muhammad Al-Sadiq (a.s) said: "It is appropriate for a person performing tamattu‘ ('Umrah followed by Hajj) when they exit ihram not to wear a shirt and to resemble those who are still in the state of ihram."