In a dream it signifies the wife or the husband. The jar also signifies the caretaker of the house, and it signifies his storehouse and his shop, and his wife who carries his water [i.e., bears his seed]. The jars of merrymaking [drums] signify the movement of travel and benefit.
Dream meaning · al-Nabulsi
Water jar (large earthen jar) زير الماء
Source: al-Nabulsi, Ta'tir al-Anam fi Ta'bir al-Manam, p. 144. English translation by iDreamBot. Quran verses: Quran.com, Saheeh International.