יורה דעה רמ״זYoreh De'ah 247

Se’if 1א׳

מִצְוַת עֲשֵׂה לִתֵּן צְדָקָה כְּפִי הַשָּׂגַת יָד, וְכַמָּה פְּעָמִים נִצְטַוֵּינוּ בָּהּ בְּמִצְוַת עֲשֵׂה. וְיֵשׁ לֹא תַּעֲשֶׂה בַּמַּעֲלִים עֵינָיו מִמֶּנָּהּ, שֶׁנֶּאֱמַר: לֹא תְאַמֵּץ אֶת לְבָבְךָ וְלֹא תִקְפֹּץ אֶת יָדְךָ (דְּבָרִים טו, ז). וְכָל הַמַּעֲלִים עֵינָיו מִמֶּנָּהּ נִקְרָא בְּלִיַּעַל, וּכְאִלּוּ עוֹבֵד עֲבוֹדַת כּוֹכָבִים. וּמְאֹד יֵשׁ לִזָּהֵר בָּהּ, כִּי אֶפְשָׁר שֶׁיָּבֹא לִידֵי שְׁפִיכוּת דָּמִים, שֶׁיָּמוּת הֶעָנִי הַמְבַקֵּשׁ אִם לֹא יִתֵּן לוֹ מִיָּד, כְּעוּבְדָא דְּנַחוּם אִישׁ גַּם זוֹ.

It is a positive commandment to give tzedakah according to the achieving hand [within reach, how much you can afford], and a few times we were commanded about it in the form of positive commandment. And there is a negative commandment in one who turns his eyes away, as it is said: “You shall not harden your heart nor shut your hand” (Devarim 15:7). And all who avert their eyes are called wicked, and it’s as if their worship is idol worship. And much so one is to be cautious about it, because it is possible that it will lead to bloodshed, that poor person who asks will die if there is none giving to his hand, like the story of Naham Ish Gamzu.

Se’if 2ב׳

לְעוֹלָם אֵין אָדָם מַעֲנִי מִן הַצְּדָקָה, וְלֹא דָּבָר רַע וְלֹא הֶזֵּק מִתְגַּלְגֵּל עַל יָדָהּ, שֶׁנֶּאֱמַר: וְהָיָה מַעֲשֵׂה הַצְּדָקָה שָׁלוֹם. (יְשַׁעְיָה לב, יז).

A person never becomes poor from charity, and no bad thing and no harm comes about through it, as it is said: "And the work of charity shall be peace" (Isaiah 32:17).

Se’if 3ג׳

כָּל הַמְרַחֵם עַל הָעֲנִיִּים, הקב"ה מְרַחֵם עָלָיו. הַגָּה: וְיִתֵּן הָאָדָם עַל לִבּוֹ שֶׁהוּא מְבַקֵּשׁ כָּל שָׁעָה פַּרְנָסָתוֹ מֵהקב"ה, וּכְמוֹ שֶׁהוּא מְבַקֵּשׁ שֶׁהקב"ה יִשְׁמַע שַׁוְעָתוֹ כָּךְ הוּא יִשְׁמַע שַׁוְעַת עֲנִיִּים. גַּם יִתֵּן אֶל לִבּוֹ כִּי הוּא גַּלְגַּל הַחוֹזֵר בָּעוֹלָם, וְסוֹף הָאָדָם שֶׁיָּבֹא הוּא אוֹ בְּנוֹ אוֹ בֶּן בְּנוֹ לִידֵי מִדָּה זוֹ, וְכָל הַמְרַחֵם עַל אֲחֵרִים מְרַחֲמִין עָלָיו (מִלְּשׁוֹן הַטּוּר).

All the ones that are merciful to the poor, the Holy One Blessed Be He is merciful to them. Rema: And the man should take it to heart that he should request every hour of his livelihood from the Holy One Blessed Be He, and like that he requests of this from the HKBH, so should he hear the pleas of poor men. Also he takes it to heart that what goes around comes around in the world, and end of the man that will come him or his son or his grandson are the ones in this state, and all the mercy he has shown to others, the Merciful one will have upon him. (language of the Tur)