1 Peter 1:5-7: "5 who by God's power are being guarded through faith for a salvation ready to be revealed in the last time. 6 In this you rejoice, though now for a little while, if necessary, you have been grieved by various trials, 7 so that the tested genuineness of your faith - more precious than gold that perishes though it is tested by fire - may be found to result in praise and glory and honor at the revelation of Jesus Christ."
Jude 3: "Beloved, although I was very eager to write to you about our common salvation, I found it necessary to write appealing to you to contend for the faith that was once for all delivered to the saints."
Jude 17: "But you must remember, beloved, the predictions of the apostles of our Lord Jesus Christ."
Jude 20-21: "20 But you, beloved, building yourselves up in your most holy faith and praying in the Holy Spirit, 21 keep yourselves in the love of God, waiting for the mercy of our Lord Jesus Christ that leads to eternal life."
+++
The passage from 1 Peter appears in the first verse. To some degree, the first two lines ("Preserve Your Word, O Savior, / To us this latter day") are a paraphrase of 1 Peter 1:5. The "various trials" in 1 Peter 1:6 seem to be the context for the hymn's exhortation to the Lord to "keep our faith from failing; / Keep hope's bright star aglow. / Let nothing from truth turn us."
The verses from Jude are more difficult to distinguish, but they seem to appear in the first half of the fourth verse, which is worth quoting in full:
Preserve Your Word and preaching,The truth that makes us whole,The mirror of Your glory,The pow'r that saves the soul.Oh, may this living water,This dew of heav'nly grace,Sustain us while here livingUntil we see Your face.
The lines "The mirror of Your glory" and "Until we see Your face" use language and imagery from 1 Corinthians 13:12: "For now we see in a mirror dimly, but then face to face. Now I know in part; then I shall know fully, even as I have been fully known."
The "living water" refers to John 4:10, 13-14: "10 Jesus answered her, 'If you knew the gift of God, and who it is that is saying to you, "Give me a drink," you would have asked him, and he would have given you living water.' 13 Jesus said to her, 'Everyone who drinks of this water will be thirsty again, 14 but whoever drinks of the water that I will give him will never be thirsty again. The water that I will give him will become in him a spring of water welling up to eternal life.'"
