"But our clothing, while modest and simple, should be of good quality, of becoming colors, and suited for service. It should be chosen for durability rather than display. It should provide warmth and proper protection. The wise woman described in the Proverbs “is not afraid of the snow for her household: for all her household are clothed with double garments.” Proverbs 31:21 , margin. MH 288.1"
"She is not afraid of the snow for her household: for all her household are clothed with scarlet."
Ellen White directly references Proverbs 31:21 in this passage.
"Our dress should be cleanly. Uncleanliness in dress is unhealthful, and thus defiling to the body and to the soul. “Ye are the temple of God....If any man defile the temple of God, him shall God destroy.” 1 Corinthians 3:16, 17 . MH 288.2"
"What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own?"
While EGW cites 1 Corinthians 3:16,17, the concept of the body as a temple is also found in 1 Corinthians 6:19. The connection is thematic, relating to the purity and care of the body as God's temple, and the consequences of defiling it.
"In all respects the dress should be healthful. “Above all things,” God desires us to “be in health”—health of body and of soul. And we are to be workers together with Him for the health of both soul and body. Both are promoted by healthful dress. MH 288.3"
"Beloved, I wish above all things that thou mayest prosper and be in health, even as thy soul prospereth."
EGW directly quotes 3 John 1:2, making it an explicit allusion.