It is narrated from Sayyiduna Jarir (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said about the runaway slave: "No prayer of his will be accepted until he returns to his masters."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2318
Al-Sha'bi narrated that he heard Sayyiduna Jarir bin Abdullah (may Allah be pleased with him) say: "Any slave who runs away from his masters has committed disbelief until he returns to them." Mansur said: By Allah, he did narrate it from the Prophet (peace and blessings be upon him), but I do not want it to be narrated from me (in that way, as a saying of the Prophet).
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2319