Quoting Commentary for Pirkei Avot 5:13

אַרְבַּע מִדּוֹת בְּנוֹתְנֵי צְדָקָה. הָרוֹצֶה שֶׁיִּתֵּן וְלֹא יִתְּנוּ אֲחֵרִים, עֵינוֹ רָעָה בְּשֶׁל אֲחֵרִים. יִתְּנוּ אֲחֵרִים וְהוּא לֹא יִתֵּן, עֵינוֹ רָעָה בְשֶׁלּוֹ. יִתֵּן וְיִתְּנוּ אֲחֵרִים, חָסִיד. לֹא יִתֵּן וְלֹא יִתְּנוּ אֲחֵרִים, רָשָׁע:

There are four middoth (levels) in the giving of charity [(and not "in the givers" of charity, for among them is one who does not give. Similarly, what follows (Mishnah 14) is to be read "in going to the house of study" (and not "in the goers to the house of study")]: desiring to give and that others not give — his eye is evil in what belongs to others, [knowing that charity enriches and not wishing others to become rich. Or: There are some who are more solicitous of the money of their kin than of their own; and even though they give they wish that their kin not give, so as not to lose their wealth.]; desiring that others give but not giving himself — his eye is evil in what belongs to him; desiring to give and that others give — a chasid; not giving and desiring that others not give — a wicked one.

Ibn Ezra

כילי The opposite of שוע. שוע Bountiful. A noble person, whose hands are loose, ready to give, and not closed. Comp. ושוע and turning.8This quotation is to prove that the two roots שוע and שעה are equivalent in meaning: to loosen, to be or to make ready, to move forward, to turn, to look, to trust. שוע is therefore explained by I. E. to be a person whose hands are loose or open, ready to give whenever opportunity is offered.—Rashi likewise derives שוע from שעה ═ שוע to turn, but in a more simple and natural way; a man to whom the eyes of the people are turned for assistance. Adopting a sort of homiletic explanation, כילי may be said to be composed of two words, כי לי for it belongs to me; for he says, שלי שלי what is mine shall remain mine9This is there declared to be מדת סדום the principle of the Sodomites. (Aboth 5:13)
Ask a RabbiBookmarkShareCopy

Tosafot Yom Tov

FOUR TYPES OF PEOPLE: HE WHO SAYS, WHAT’S MINE IS MINE, ETC. The mishna is not discussing giving tzedakah, for the types of people who give tzedakah are discussed in mishna 13. It is speaking simply of benefitting from people’s possessions.
Ask a RabbiBookmarkShareCopy

Ikar Tosafot Yom Tov

"What is mine, etc.": We are not speaking about givers of charity - as those we teach later [in] Mishnah 13 - but rather about benefit in general.
Ask a RabbiBookmarkShareCopy