Sunan An-Nasa'i

It was narrated from 'Alqamah that:Ibn Masud met 'Uthman at 'Arafat and spoke to him in private. Uthman said to Ibn Masud: ""Are you interested in a girl so that I marry her to you?"" 'Abdullah called 'Alqamah and he told him that the Prophet said: 'Whoever among you can afford to get married, let him do so. Whoever cannot afford it, let him fast, for fasting will be a restraint (Wija) for him