Exodus 21:20

And if a man smite his servant or his maid with a rod
A Canaanitish servant or maid, as the Targum of Jonathan, and so Jarchi; and that only with a rod for the correction of them, and not with a sword or any such destroying weapon, which would seem as though he intended to kill, yet nevertheless:

and he die under his hand;
immediately, while he is smiting or beating him or her, on the same day, as the above Targum interprets it:

he shall be surely punished;
or condemned to the punishment of being slain with the sword, as the said Targum and Jarchi explain it: this law was made to deter masters from using severity and cruelty towards their servants.