Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
A water carrier in a dream is a knowledgeable man who benefits people with his knowledge. Whoever sees himself giving water to people is spreading knowledge among them.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
A water carrier indicates a generous man. Drinking from his hand indicates receiving good from him.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
A water carrier is interpreted as a righteous man. Whoever sees himself become a water carrier, his affair will become righteous.