(a) Sayyiduna Ali (may Allah be pleased with him) said concerning a mouse that fell into a well and died, that the water should be drawn out until it overwhelms the people. This narration is not strong, because Abu al-Bakhtari did not hear from Sayyiduna Ali (may Allah be pleased with him). This narration is munqati' (broken).
(b) Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) says: When a mouse falls into a well and dies, one or two buckets are to be drawn from it, and if it has burst apart, five or seven buckets are to be drawn; and this narration too is munqati'.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1270