The New John Gill Exposition of the Entire BibleDeuteronomy 15:13
And when thou sendest him out free from thee…
discharged him from his servitude, and made him a free man:
thou shall not let him go away empty;
without anything to support
himself, or to put himself in a way of business; he having in the time
of his servitude worked entirely for his master, and so could not have
got and saved anything for himself.