`an ummi salamah, qalat: lam yakun tawbun ahabba ila rasuli l-lahi
salla l-lahu `alayhi wa sallam mina l-qamis.

Umm Salamah reported that no *piece* (thawb) of clothing was more
beloved to the Messenger of Allah (May Allah bless him and give him
peace) than the qamees.

Ibn Majah, Libaas, Mawdi` al-Izaar, hadith #3563