Bountiful (abundant, timly) rain/ beneficial rain/ plenteous
Rains that fall in the proper measure and with fitting intensity (the original source is Book of Ezekiel 34:26: ‘I will cause the rain to fall in its season; they shall be rains of blessing’).
(A story is told of Choni the Circle-Drawer: They said to him, "Pray that rain will fall!" He said to them, "Go and bring in the Passover ovens so they don't get wet." He prayed but no rain fell. What did he do? He made a circle and stood inside it, saying before Him: "Master of the Universe! Your children have turned to me as a son of the house before You. I swear by Your great Name that I will not move from here until You have mercy on Your children." The rains began as drizzles. He said, "Not like this I asked, but rain of cisterns, ditches, and caves." The rains began to fall heavily. He said, "Not like this I asked, but rains of favor, blessing, and voluntary offering." They fell as usual - Ta'anit 19a.)
Translation
Expression (Hebrew)
גִּשְׁמֵי רָצוֹן בְּרָכָה וּנְדָבָה
Definition (Hebrew)
גְּשָׁמִים הַיּוֹרְדִים בַּכַּמּוּת וּבְעָצְמָה הַמַּתְאִימָה (הַמָּקוֹר הָרִאשׁוֹנִי בִּיחֶזְקֵאל לֵד כו: "וְהוֹרַדְתִּי הַגֶּשֶׁם בְּעִתּוֹ גִּשְׁמֵי בְרָכָה יִהְיוּ").
("מַעֲשֶׂה שֶׁאָמְרוּ לוֹ לְחוֹנִי הַמְעַגֵּל: הִתְפַּלֵּל שֶׁיֵּרְדוּ גְּשָׁמִים! אָמַר לָהֶם: צְאוּ וְהַכְנִיסוּ תַּנּוּרֵי פְּסָחִים בִּשְׁבִיל שֶׁלֹּא יִמּוֹקוּ. הִתְפַּלֵּל וְלֹא יָרְדוּ גְּשָׁמִים. מֶה עָשָׂה? עָג עוּגָה וְעָמַד בְּתוֹכָהּ, וְאָמַר לְפָנָיו: רִבּוֹנוֹ שֶׁל עוֹלָם! בָּנֶיךָ שָׂמוּ פְּנֵיהֶם עָלַי שֶׁאֲנִי כְּבֶן בַּיִת לְפָנֶיךָ, נִשְׁבָּע אֲנִי בְּשִׁמְךָ הַגָּדוֹל שֶׁאֵינִי זָז מִכָּאן עַד שֶׁתְּרַחֵם עַל בָּנֶיךָ. הִתְחִילוּ גְּשָׁמִים מִנְּטָפִין, אָמַר: לֹא כָּךְ שָׁאַלְתִּי, אֶלָּא גִּשְׁמֵי בּוֹרוֹת שִׁיחִין וּמְעָרוֹת. הִתְחִילוּ לֵרֵד בְּזַעַף, אָמַר: לֹא כָּךְ שָׁאַלְתִּי, אֶלָּא גִּשְׁמֵי רָצוֹן בְּרָכָה וּנְדָבָה. יָרְדוּ כְּתִקְנָן"- תַּעֲנִית יט ע"א)