'Whereby' in the Bible

Whereby, when ye read, ye may understand my knowledge in the mystery of Christ)

That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive;

And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.