Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: The Noble Prophet (peace and blessings be upon him) said: "When a person extends his hand towards his private part and there is no barrier or obstruction between the two, then that person should perform ablution." (Imam Ibn Hibban, may Allah have mercy on him, says:) Our argument in this narration is based on the narration transmitted by Nafi' bin Abu Nu'aym, not on the narration transmitted by Yazid bin Abdul Malik, because we are absolved from considering Yazid bin Abdul Malik as reliable. As this has been mentioned in the book al-Du'afa.