Is delaying a single prayer beyond its elective time considered a greater major sin than suicide, adultery, consuming alcohol, and theft by scholarly consensus of Muslims, and what is the evidence for that?

This ruling applies to one who deliberately abandons prayer until its time expires without an excuse, not to one who delays it beyond its preferred time.

Muslims are in agreement that deliberately abandoning an obligatory prayer is one of the gravest sins and major transgressions, and its sin is greater than the sin of taking a life, seizing wealth, committing adultery, theft, or drinking alcohol.

There is no comparison between abandoning prayer and other major sins, for the texts that emphasize the severity of abandoning prayer are unparalleled. Many scholars have declared the one who abandons prayer to be a disbeliever due to the enormity of his crime, while no one has declared an adulterer or a murderer to be a disbeliever.