Sahih Bukhari | Volume 7 | Hadith Number 775

Narrated by Um Salama
That once the Prophet was in her house, and an effeminate man was there too. The effeminate man said to 'Abdullah, (Um Salama's brother) "0 'Abdullah! If Ta'if should be conquered tomorrow, I recommend you the daughter of Ghailan, for she is so fat that she has four curves in the front (of her belly) and eight at the back." So the Prophet said (to his wives) "These effeminate (men) should not enter upon you (your houses).