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.'" (AR)
English reference (AR): Vol. 1, Book 1, Hadith 592 (AR)
Arabic reference (AR): Book 1, Hadith 635 (AR)