Allah’s Messenger (Sallallaahu `alayhi wa sallam) said,
“When someone with whose religion and character you are satisfied asks your daughter in marriage, accede to his request. If you do not do so, there will be temptation on Earth and extensive corruption.”
Hadith – Al-Tirmidhi #3090, Narrated Abu Hurairah (Radiyallaahu `anhu). Nasa’i and Ibn Majah transmitted it.