Abdullah bin Malik al-Ghafiqi (may Allah be pleased with him) heard the Prophet (peace and blessings be upon him) saying to Umar bin al-Khattab (may Allah be pleased with him): "When I am in a state of janabah, I perform ablution; I eat and drink, but I do not pray nor recite the Qur'an until I take a ritual bath."
(b) The Shaykh (may Allah have mercy on him) said: Al-Waqidi narrated it from Abdullah bin Sulayman in the same way.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 415