Great blessings were promised to Israel on condition of obedience to the Lord's directions. “I will give you rain in due season,” He declared, “and the land shall yield her increase, and the trees of the field shall yield their fruit. And your threshing shall reach unto the vintage, and the vintage shall reach unto the sowing time: and ye shall eat your bread to the full, and dwell in your land safely. And I will give peace in the land, and ye shall lie down, and none shall make you afraid: and I will rid evil beasts out of the land, neither shall the sword go through your land.... I will walk among you, and will be your God, and ye shall be My people.... But if ye will not hearken unto Me, and will not do all these commandments; and ... ye break My covenant: ... ye shall sow your seed in vain, for your enemies shall eat it. And I will set My face against you, and ye shall be slain before your enemies: they that hate you shall reign over you; and ye shall flee when none pursueth you.” …
"Then I will give you rain in due season, and the land shall yield her increase, and the trees of the field shall yield their fruit."
EGW directly quotes Leviticus 26:4 and refers to the blessings promised for obedience, which are detailed in the surrounding verses.
"Then I will give you rain in due season, and the land shall yield her increase, and the trees of the field shall yield their fruit. And your threshing shall reach unto the vintage, and the vintage shall reach unto the sowing time: and ye shall eat your bread to the full, and dwell in your land safely. And I will give peace in the land, and ye shall lie down, and none shall make you afraid: and I will rid evil beasts out of the land, neither shall the sword go through your land. And ye shall chase your enemies, and they shall fall before you by the sword. And five of you shall chase an hundred, and an hundred of you shall put ten thousand to flight: and your enemies shall fall before you by the sword. For I will have respect unto you, and make you fruitful, and multiply you, and establish my covenant with you. And ye shall eat old store, and bring forth the old because of the new. And I will set my tabernacle among you: and my soul shall not abhor you. And I will walk among you, and will be your God, and ye shall be my people. I am the Lord your God, which brought you forth out of the land of Egypt, that ye should not be their bondmen; and I have broken the bands of your yoke, and made you go upright. But if ye will not hearken unto me, and will not do all these commandments; And if ye shall despise my statutes, or if your soul abhor my judgments, so that ye will not do all my commandments, but that ye break my covenant: I also will do this unto you; I will even appoint over you terror, consumption, and the burning ague, that shall consume the eyes, and cause sorrow of heart: and ye shall sow your seed in vain, for your enemies shall eat it. And I will set my face against you, and ye shall be slain before your enemies: they that hate you shall reign over you; and ye shall flee when none pursueth you."
Ellen White directly references Leviticus 26:4-17 in this passage.
"There are many who urge with great enthusiasm that all men should have an equal share in the temporal blessings of God. But this was not the purpose of the Creator. A diversity of condition is one of the means by which God designs to prove and develop character. Yet He intends that those who have worldly possessions shall regard themselves merely as stewards of His goods, as entrusted with means to be employed for the benefit of the suffering and the needy. PP 535.2"
"For ye have the poor always with you; but me ye have not always."
EGW's statement about the diversity of conditions and the role of the wealthy echoes the sentiment in Matthew 26:11 that the poor will always be present. While not a direct quote, the underlying theme of the existence of poverty and the responsibility of those with means is present in both.