Dawud bin Salih al-Tammar narrates from his mother that her freed slave-woman sent a bowl of harisah as a gift to Sayyidah Aishah (may Allah be pleased with her). She brought it while Sayyidah Aishah (may Allah be pleased with her) was standing in prayer. Sayyidah Aishah (may Allah be pleased with her) gestured to her to put it down, so she put it down. There were women with Sayyidah Aishah (may Allah be pleased with her). A cat came and ate from it once, or ate one morsel. When she finished (the prayer), Sayyidah Aishah (may Allah be pleased with her) said to the women: Eat; and they began avoiding the place where the cat's mouth had been. Then Sayyidah Aishah (may Allah be pleased with her) took it, turned it around and ate it, and she said that the Messenger of Allah (peace and blessings be upon him) said: "It is not impure; it only goes round among you." And I saw the Messenger of Allah (peace and blessings be upon him); he (peace and blessings be upon him) would perform ablution with the water it had left.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1166