'Add' in the Bible

and now, my father laid on you a heavy yoke, and I -- I add unto your yoke; my father chastised you with whips, and I -- with scorpions.'

and speaketh unto them according to the counsel of the lads, saying, 'My father made your yoke heavy, and I -- I add unto it; my father chastised you with whips, and I -- with scorpions.'

and say to them, 'Ye do not bring in the captives hither, for, to guilt against Jehovah on us, ye are saying to add unto our sin and unto our guilt? for abundant is the guilt we have, and the fierceness of anger on Israel.'

and I add not to turn aside the foot of Israel from off the ground that I appointed to your fathers, only, if they watch to do all that I have commanded them -- to all the law, and the statutes, and the ordinances by the hand of Moses.'