كتاب الأمور المنهي عنها
17  
The Book of the Prohibited actions
(349)
Chapter: Prohibition for a Slave to run away from his Master
(349)
- باب تغليظ تحريم إباق العبد من سيده
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 ‏"‏ ‏.‏
Reference : Riyad as-Salihin 1769
In-book reference : Book 17, Hadith 259