The Hajj of One Who Does Not Pray
What is the ruling concerning the one who performs Hajj while he has abandoned prayer, either intentionally because he believes he doesn't have to or due to neglect? Is his Hajj acceptable?
Whoever performs the Hajj while he does not pray because he believes it is not obligatory, then he has committed Kufr by consensus and his Hajj is not accepted. However, if he does not pray out of laziness and neglect, then in this case there is a difference of opinion amongst the people of knowledge. From amongst them are those who view his Hajj as correct, and likewise there are those who view his Hajj as incorrect. And that which is correct is that it is not accepted for that which the Prophet (Peace and blessings be up on him) said:
"The covenant that is between us and them [the disbelievers] is the prayer. Whoever abandons it has committed Kufr."
And He (Peace and blessings be up on him) also said:
"Between a man and disbelief and polytheism is the abandoning of the prayer."
And this is general and encompasses both one who believes it is not obligatory and one who does not pray out of laziness or neglect.
And with Allah lies all success and may Allah send prayers and salutations upon our Prophet (Peace and blessings be up on him) and his family and his companions.
Sheikh Ibn Baz