Adam Clarke on Exodus 21:3

If he came in by himself - If he and his wife came in together, they were to go out together: in all respects as he entered, so should he go out. This consideration seems to have induced St. Jerome to translate the passage thus: Cum quali veste intraverat, cum tali exeat. "He shall have the same coat in going out, as he had when he came in," i.e., if he came in with a new one, he shall go out with a new one, which was perfectly just, as the former coat must have been worn out in his master's service, and not his own.