Sayyiduna Abu Hurayrah (may Allah be pleased with him) says: When a cat puts its mouth (into a vessel), it is to be washed once.
Muhammad bin Umar al-Qasabi erred in it, narrating it from Abd al-Warith, from Ayyub, inserted into the marfu' hadith.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1171