Purification (Kitab Al-Taharah)

Dawud :: Book 1 : Hadith 212

Narrated Abdullah ibn Sa'd al-Ansari:

Abdullah asked the Apostle of Allah (peace_be_upon_him): What is lawful for me to do with my wife when she is menstruating? He replied: What is above the waist-wrapper is lawful for you.

The narrator also mentioned (the lawfulness of) eating with a woman in menstruation, and he transmitted the tradition in full.