"and there be refreshed the son of your maid-servant": This refers to an uncircumcised (Canaanite) servant. You say this, but perhaps it refers to a circumcised servant? — (This cannot be, for Ibid. 20:10) "your man-servant and your maid-servant" already refers to a circumcised man-servant. What, then, is the intent of "and there be refreshed your man-servant and your maid-servant"? An uncircumcised man-servant.