Jude 1

20 But you, dear friends, by**Here "by" is supplied as a component of the participle ("building up") which is understood as means building yourselves up in your most holy faith, by**Here "by" is supplied as a component of the participle ("praying") which is understood as means praying in the Holy Spirit, 21 keep yourselves in the love of God, looking forward to the mercy of our Lord Jesus Christ to eternal life.