It was narrated that Shakal bin Humaid said: "I came to the Prophet [SAW] and said: 'O Prophet of Allah, teach me words by which I may seek refuge (with Allah).' He took me by the hand then said: 'Say: A'udhu bika min sharri sam'i, wa sharri basari, wa sharri lisani, wa sharri qalbi, wa sharri mani (I seek refuge in You from the evil of my hearing, the evil of my seeing, the evil of my tongue, the evil of my heart, and the evil of my sperm),' until I had memorized it." Waki' contradicted him in the wordings.