Imam Abu Ya'la recorded this report from Sayyiduna Ali (may Allah be pleased with him). He says: I saw the Prophet (peace and blessings be upon him) perform ablution (wudu) and then recite part of the Qur'an. Then he said: "This is for one who is not in a state of major ritual impurity (janabah). As for one in janabah, then no, not even a single verse."
Its narrators have been declared trustworthy.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الطهارة / 1509