Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The chest in a dream is the repository of knowledge and secrets. Its breadth indicates forbearance and knowledge. Its narrowness indicates ignorance and stinginess.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The chest indicates religion and Islam. Its soundness is the soundness of religion, and its illness is illness in religion.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The chest is interpreted as prestige and status. Whoever sees his chest is broad will gain high status.