'Rigour' in the Bible

Thou shalt not rule over him with rigour; and thou shalt fear thy God.

And ye shall leave them as an inheritance to your children after you, to inherit them as a possession: these may ye make your bondmen for ever; but as for your brethren, the children of Israel, ye shall not rule over one another with rigour.

As a hired servant shall he be with him year by year; his master shall not rule with rigour over him before thine eyes.

The weak have ye not strengthened, nor have ye healed the sick, and ye have not bound up what was broken, neither have ye brought again that which was driven away, neither have ye sought for that which was lost; but with harshness and with rigour have ye ruled over them.