"Business Principles God's word sanctions no policy that will enrich one class by the oppression and suffering of another. In all our business transactions it teaches us to put ourselves in the place of those with whom we are dealing, to look not only on our own things, but also on the things of others. He who would take advantage of another's misfortunes in order to benefit himself, or who seeks to profit himself through another's weakness or incompetence, is a transgressor both of the principles and of the precepts of the word of God. MH 187"
"Look not every man on his own things, but every man also on the things of others."
The passage directly echoes the principle of looking out for the interests of others, not just oneself, as taught in Philippians 2:4.
"None need fear that their liberality would bring them to want. Obedience to God's commandments would surely result in prosperity. “For this thing,” God said, “the Lord thy God shall bless thee in all thy works, and in all that thou puttest thine hand unto.” “Thou shalt lend unto many nations, but thou shalt not borrow; and thou shalt reign over many nations, but they shall not reign over thee.” Deuteronomy 15:10, 6 . MH 187.1"
"Thou shalt surely give him, and thine heart shall not be grieved when thou givest unto him: because that for this thing the Lord thy God shall bless thee in all thy works, and in all that thou puttest thine hand unto."
EGW directly quotes Deuteronomy 15:10.
"For the Lord thy God blesseth thee, as he promised thee: and thou shalt lend unto many nations, but thou shalt not borrow; and thou shalt reign over many nations, but they shall not reign over thee."
EGW directly quotes Deuteronomy 15:6.
"“Thou shalt not pervert the judgment of the stranger, nor of the fatherless; nor take a widow's raiment to pledge.” “When thou dost lend thy brother anything, thou shalt not go into his house to fetch his pledge. Thou shalt stand abroad, and the man to whom thou dost lend shall bring out the pledge abroad unto thee. And if the man be poor, thou shalt not sleep with his pledge.” “If thou at all take thy neighbor's raiment to pledge, thou shalt deliver it unto him by that the sun goeth down: for that is his covering only: ... wherein shall he sleep? and it shall come to pass, when he crieth unto Me, that I will hear; for I am gracious.” “If thou sell aught unto thy neighbor, or buyest aught of thy neighbor's hand, ye shall not oppress one another” Deuteronomy 24:17, 10-12 ; Exodus 22:26, 27 ; Leviticus 25:14 . MH 187.3"
"And if thou sell ought unto thy neighbour, or buyest ought of thy neighbour’s hand, ye shall not oppress one another:"
Ellen White directly references Leviticus 25:14 in this passage.