הֲרֵי זֶה צַדִּיק גָּמוּר! דִּילְמָא בָּתַר דְּבָדֵק אָתֵי לְעַיּוֹנֵי בָּתְרַהּ.
this person is a full-fledged righteous person as far as that mitzva is concerned? These ulterior motives, e.g., seeking a reward, do not detract from the value of the mitzva. The Gemara answers: There is still concern lest he look for the needle after he searched for leaven and completed the search. There is danger that since he already completed the mitzva, its merit will not protect him when he is searching for the needle.
וּכְהַאי גַּוְונָא לָאו מִצְוָה הוּא?! וְהָתַנְיָא: הָאוֹמֵר ״סֶלַע זוֹ לִצְדָקָה בִּשְׁבִיל שֶׁיִּחְיֶה בְּנִי״ אוֹ ״שֶׁאֶהְיֶה בֶּן הָעוֹלָם הַבָּא״ —
The Gemara asks: And in a case like that, where there is personal interest intermingled with the performance of a mitzva, is it not nevertheless considered a mitzva? But wasn’t it taught in a baraita that one who says: I am contributing this sela to charity so that my son will live, or if he says: I am performing the mitzva so that I will be one destined for the World-to-Come,
הָבִ֨יאוּ אֶת־כׇּל־הַֽמַּעֲשֵׂ֜ר אֶל־בֵּ֣ית הָאוֹצָ֗ר וִיהִ֥י טֶ֙רֶף֙ בְּבֵיתִ֔י וּבְחָנ֤וּנִי נָא֙ בָּזֹ֔את אָמַ֖ר יְהֹוָ֣ה צְבָא֑וֹת אִם־לֹ֧א אֶפְתַּ֣ח לָכֶ֗ם אֵ֚ת אֲרֻבּ֣וֹת הַשָּׁמַ֔יִם וַהֲרִיקֹתִ֥י לָכֶ֛ם בְּרָכָ֖ה עַד־בְּלִי־דָֽי׃
Bring the full tithe into the storehouse, and let there be food in My House, and thus put Me to the test—said the LORD of Hosts. I will surely open the floodgates of the sky for you and pour down blessings on you;
הָבִ֨יאוּ אֶת־כׇּל־הַֽמַּעֲשֵׂ֜ר אֶל־בֵּ֣ית הָאוֹצָ֗ר וִיהִ֥י טֶ֙רֶף֙ בְּבֵיתִ֔י וּבְחָנ֤וּנִי נָא֙ בָּזֹ֔את אָמַ֖ר יְהֹוָ֣ה צְבָא֑וֹת אִם־לֹ֧א אֶפְתַּ֣ח לָכֶ֗ם אֵ֚ת אֲרֻבּ֣וֹת הַשָּׁמַ֔יִם וַהֲרִיקֹתִ֥י לָכֶ֛ם בְּרָכָ֖ה עַד־בְּלִי־דָֽי׃
Bring the full tithe into the storehouse, and let there be food in My House, and thus put Me to the test—said the LORD of Hosts. I will surely open the floodgates of the sky for you and pour down blessings on you;