Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
A jar in a dream is a servant or a woman. Its fullness indicates wealth, and its emptiness indicates poverty. Breaking it indicates the death of the servant or the divorce of the wife.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
A jar indicates a man's secret. Whoever sees himself drink from it will learn a secret.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
A jar is interpreted as a woman. Whoever sees himself buy one will get married.