Literatura Drugiej Świątyni do Powtórzonego Prawa 28:12

יִפְתַּ֣ח יְהוָ֣ה ׀ לְ֠ךָ אֶת־אוֹצָר֨וֹ הַטּ֜וֹב אֶת־הַשָּׁמַ֗יִם לָתֵ֤ת מְטַֽר־אַרְצְךָ֙ בְּעִתּ֔וֹ וּלְבָרֵ֕ךְ אֵ֖ת כָּל־מַעֲשֵׂ֣ה יָדֶ֑ךָ וְהִלְוִ֙יתָ֙ גּוֹיִ֣ם רַבִּ֔ים וְאַתָּ֖ה לֹ֥א תִלְוֶֽה׃

Otworzy ci Wiekuisty skarbnicę Swą dobroczynną, - niebo, aby dać deszcz ziemi twej w czasie swoim, i by błogosławić wszelkiej sprawie rąk twoich, że będziesz wypożyczał wielu narodom, sam zaś nie pożyczał. 

Who is the Heir of Divine Things

[76] Now that he who has gone forth from us and desires to be God’s attendant is the heir of the glorious wealth that nature has to give is testified by Moses in the words “He led him out outside and said ‘Look up into heaven’ ” (Gen. 15:5). For heaven is the treasury of divine blessings. “May the Lord,” he says, “open to thee His good treasure, the heaven” (Deut. 28:12)—that heaven from which the bountiful Giver rains down continually His most perfect joys. Yes, look up, and thus convict of their errors the multitude of common men, the blind race, which has lost the sight which it thinks it possesses.
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Allegorical Interpretation of Genesis

[104] Seeing then that we have found two natures created, undergoing moulding, and chiselled into full relief by God’s hands, the one essentially hurtful, blameworthy, and accursed, the other beneficial and praiseworthy, stamped the one with a counterfeit, the other with a genuine impression, let us offer a noble and suitable prayer, which Moses offered before us, “that God may open to us His own treasury” (Deut. 28:12) and that sublime reason pregnant with divine illumination, to which He has given the title of “heaven”; and that He may close up the treasuries of evil things.
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On the Unchangeableness of God

[156] Or shall we draw up with ropes the drink which has been stored by the devices of men and accept as our haven and refuge a task which argues our lack of true hope; we to whom the Saviour of all has opened His celestial treasure for our use and enjoyment? For Moses the revealer prays that the Lord may open to us His good treasure, the heaven, to give us rain (Deut. 28:12), and the prayers of him whom God loves are always heard.
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