From him, from Al-Abbas, from Abdullah ibn Al-Mughira, from Abu Ayyub, from Muhammad ibn Muslim, narrated from Abu Abdullah عليه السلام: I said to Imam عليه السلام: "A pond that has collected water - animals urinate in it, dogs drink from it, and a person in a state of janabah (major ritual impurity) bathes in it - what is its ruling?" Imam عليه السلام said: "If it contains the amount of a kurr, then nothing renders it impure. A kurr is six hundred ritl."