The Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, narrated to me from Ahmad ibn Muhammad, from his father, from Muhammad ibn Yahya, and al-Husayn ibn Ubaydullah, from Ahmad ibn Muhammad ibn Yahya, from his father Muhammad ibn Yahya, from Muhammad ibn Ali ibn Mahbub, from Ahmad, from his father, from Abdullah ibn al-Mughira, from Umar ibn Yazid, who said: Amr ibn Sa’id ibn Hilal narrated to me, saying: I asked Abu Ja’far عليه السلام about what falls into a well, ranging from a mouse and a cat to a sheep. Imam عليه السلام said: “For all of these, draw seven buckets of water”. He (Narrator) continued to ask until he asked about a donkey and a camel, to which Imam عليه السلام said: “A kurr of water”.