Riyad as-Salihin 1769
Jarir bin Abdullah (May Allah be pleased with him) said:
The Prophet (ﷺ) said, "When the slave runs away from his master, his Salat (prayer) will not be accepted." [Muslim] . Another narration is: "He is guilty of disbelief (i.e., in case he believes in the lawfulness of doing so)."
وعنه عن النبي صلى الله عليه وسلم  ‏:‏ ‏"‏إذا أبق العبد، لم تقبل له صلاة ‏"‏ ‏(‏‏(‏رواه مسلم‏)‏‏)‏ ‏.‏ وفي رواية‏:‏ ‏"‏فقد كفر ‏"‏ ‏.‏