Deuteronomy 4:2

4:2 Do not add a thing to what I command you nor subtract from it, so that you may keep the commandments of the Lord your God that I am delivering to you.

Deuteronomy 4:12

4:12 Then the Lord spoke to you from the middle of the fire; you heard speech but you could not see anything – only a voice was heard.

Deuteronomy 28:35

28:35 The Lord will afflict you in your knees and on your legs with painful, incurable boils – from the soles of your feet to the top of your head.