Muhammad bin Ka'b (may Allah have mercy on him) once said to Abdur Rahman (may Allah be pleased with him), "If you have heard any hadith from your father from the Prophet Muhammad (peace and blessings be upon him), then narrate it to me." He narrated from his father that he heard the Prophet Muhammad (peace and blessings be upon him) say: "Whoever plays with twelve sticks and then stands to pray, his example is like that of a person who performs ablution with vomit and the blood of a pig and then stands to pray."