Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The shirt in a dream is a man's religion, his world, or his work. A new, wide shirt indicates righteousness in religion and abundance in the world. A torn shirt indicates separation or divorce. A wet shirt is a difficult journey. Joseph's (Yusuf's) shirt is good news of relief, salvation, and healing for the eyes.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The shirt indicates a man's condition. Whoever sees himself wear a new shirt will get married if unmarried or be blessed with a son. Whoever sees his shirt without a sleeve is a poor man who owns nothing.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The shirt is interpreted as the man, and whatever good or bad is seen in it reflects on him. A white shirt is religion and piety, green is martyrdom, and black is worry and grief.