A woman from Banu Sulaym, who had acted as a midwife for most of the children of Banu Shabiyah, narrated that the Prophet Muhammad (peace be upon him) sent for Uthman bin Talhah through a messenger, or it was that he himself asked Uthman why the Prophet (peace be upon him) had called him. He replied that the Prophet (peace be upon him) said: When I entered the House of Allah (the Ka'bah), I saw two ram's horns there. I forgot to tell you to cover them, so now go and cover them, because it is not appropriate for anything to be in the House of Allah that may distract a worshipper. The narrator says that both horns remained in the Ka'bah, and when the House of Allah caught fire, they too were burnt.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 23221