Thou shalt not rule over him with rigour; but shalt fear thy God.
You shall not rule over him with harshness (severity, oppression), but you shall [reverently] fear your God. [Eph. 6:9; Col. 4:1.]
Thou shalt not rule over him with rigor, but shalt fear thy God.
You will not harshly rule over them but must fear your God.
Do not afflict him by power, but be fearful of your God.
Afflict him not by might: but fear thy God.