Reference: Sharh ‘Umdatil-Fiqh – Tape No.1, Question No.35
Question: A man approached me to seek my daughter’s hand in marriage, and later it became apparent to me that he does not pray, so what should I do?
Response: You should not marry your daughter to him. So long as he does not pray, then he is a disbeliever, so do not marry your daughter to him.
 Jaabir ibn ‘Abdillaah (radhi-yAllaahu ‘annual) narrated the Prophet ﷺ said:
«Between a man and shirk and disbelief there stands his neglect of the prayer» Transmitted by Muslim
Buraydah ibn al-Husayb (radhi-yAllaahu ‘anhu) said: “I heard the Messenger of Allaah ﷺ say:
«The covenant that distinguishes between us and them is the prayer, and whoever neglects it has disbelieved (become a disbeliever)» Transmitted by Ahmad, Abu Daawood, at-Tirmidhi, an-Nisaa.ee and Ibn Maajah