Sahih Bukhari
Virtues of the Prayer Hall (Sutra of the Musalla)
Volume: 001 / Book Number: 009 / Hadith Number: 486
Narrated 'Aisha:
Do you make us (women) equal to dogs and donkeys? While I used to lie in my bed, the Prophet would come and pray facing the middle of the bed. I used to consider it not good to stand in front of him in his prayers. So I used to slip away slowly and quietly from the foot of the bed till I got out of my guilt.