Musannaf Ibn Abi Shaybah

Hazrat Aamir (may Allah have mercy on him) says that the escape of a slave is not a divorce.

Hazrat Qatadah says that the escape of a slave is not a divorce.

Hazrat Hasan (may Allah be pleased with him) says that the escape of a slave is a divorce.

Hazrat Hoshab, may Allah have mercy on him, says that Hasan was asked what is the ruling if a married slave runs away? He replied that if he returns before the completion of the waiting period (‘iddah), she will remain his wife, and if the waiting period is completed, she will be separated from him with one irrevocable divorce.