Sayyidah Safiyyah bint Shaybah (may Allah be pleased with her) said: I saw the Messenger of Allah (peace and blessings be upon him) wet a cloth while he was inside the Ka'bah, and then he began to rub out the images that were in it.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21181