Sayyiduna Abdullah bin Malik Ghafiqi narrates: He heard the Prophet Muhammad (peace be upon him) saying to Sayyiduna Umar bin Khattab (may Allah be pleased with him): "When I perform ablution in the state of major ritual impurity (janabah), I can eat and drink, but I do not perform prayer nor recite the Qur'an until I have taken a bath (ghusl)."
Hadith Referenceسنن الدارقطني / كتاب الطهارة / 428