"That our influence should be a savor of death unto death is a fearful thought, yet it is possible. One soul misled, forfeiting eternal bliss—who can estimate the loss! And yet one rash act, one thoughtless word, on our part may exert so deep an influence on the life of another that it will prove the ruin of his soul. One blemish on the character may turn many away from Christ. PK 86.1"
"To the one we are the savour of death unto death; and to the other the savour of life unto life. And who is sufficient for these things?"
EGW uses the phrase "savor of death unto death" which is directly from 2 Corinthians 2:16. The context of influence is also similar.
"As the seed sown produces a harvest, and this in turn is sown, the harvest is multiplied. In our relation to others, this law holds true. Every act, every word, is a seed that will bear fruit. Every deed of thoughtful kindness, of obedience, of self-denial, will reproduce itself in others, and through them in still others. So every act of envy, malice, or dissension is a seed that will spring up in a “root of bitterness” whereby many shall be defiled. Hebrews 12:15 . And how much larger number will the “many” poison! Thus the sowing of good and evil goes on for time and for eternity. PK 86.2"
"Looking diligently lest any man fail of the grace of God; lest any root of bitterness springing up trouble you, and thereby many be defiled;"
EGW directly quotes Hebrews 12:15, referencing the "root of bitterness" and its defiling effect on many.
"Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap."
Both passages convey the principle of sowing and reaping, where actions have consequences.