It was narrated that Jabir bin 'Abdullah said:
"The Prophet was asked about whether a person who is sexually impure can sleep, or eat, or drink. He said: 'yes, if he does ablution as for the prayer.'" (JA)
English reference (JA): Vol. 1, Book 1, Hadith 592 (JA)
Arabic reference (JA): Book 1, Hadith 635 (JA)