This is often quoted in stories. When insulted keep quiet and daven for someone who needs a yeshua. Can you find me this source?
שׁוּב מַעֲשֶׂה בְּרַבִּי אֱלִיעֶזֶר שֶׁיָּרַד לִפְנֵי הַתֵּיבָה, וְאָמַר עֶשְׂרִים וְאַרְבַּע בְּרָכוֹת וְלֹא נַעֲנָה. יָרַד רַבִּי עֲקִיבָא אַחֲרָיו וְאָמַר: ״אָבִינוּ מַלְכֵּנוּ אֵין לָנוּ מֶלֶךְ אֶלָּא אָתָּה. אָבִינוּ מַלְכֵּנוּ, לְמַעַנְךָ רַחֵם עָלֵינוּ״, וְיָרְדוּ גְּשָׁמִים. הֲווֹ מְרַנְּנִי רַבָּנַן, יָצְתָה בַּת קוֹל וְאָמְרָה: לֹא מִפְּנֵי שֶׁזֶּה גָּדוֹל מִזֶּה, אֶלָּא שֶׁזֶּה מַעֲבִיר עַל מִידּוֹתָיו, וְזֶה אֵינוֹ מַעֲבִיר עַל מִדּוֹתָיו.
There was another incident involving Rabbi Eliezer, who descended to serve as prayer leader before the ark on a fast day. And he recited twenty-four blessings, but he was not answered. Rabbi Akiva descended before the ark after him and said: Our Father, our King, we have no king other than You. Our Father, our King, for Your sake, have mercy on us. And rain immediately fell. The Sages were whispering among themselves that Rabbi Akiva was answered while his teacher, Rabbi Eliezer, was not. A Divine Voice emerged and said: It is not because this Sage, Rabbi Akiva, is greater than that one, Rabbi Eliezer, but that this one is forgiving, and that one is not forgiving. God responded to Rabbi Akiva’s forgiving nature in kind by sending rain - Ta’anis 25b