(Genesis 30:27) Rav Huna said in the name of Rav: There are three pairings that must follow immediately one upon the other. Immediately after redemption, prayer. Immediately after laying hands on the offering, the slaughtering. Immediately after washing the hands, the blessing. Immediately after the final washing of the hands, the grace after meals. Abaye said: Also, immediately upon being near a Torah scholar comes blessing in the work of one's hands, as it is said, "I have observed by divination that the LORD has blessed me [for your sake]" and so forth. If you prefer, derive it from here: "and the LORD blessed the Egyptian's house for Joseph's sake" (Genesis 39:5).
The Three Acts That Must Follow One Another Without Delay
Yalkut Shimoni on Torah 130:6
(בראשית ל כז) אָמַר רַב הוּנָא אָמַר רַב, שְׁלשָׁה תְּכִיפוֹת הֵן, תֵּכֶף לִגְאוּלָה תְּפִלָּה, תֵּכֶף לִסְמִיכָה שְׁחִיטָה, תֵּכֶף לִנְטִילַת יָדַיִם בְּרָכָה, תֵּכֶף לִנְטִילַת יָדַיִם אַחֲרוֹנָה בִּרְכַּת הַמָּזוֹן, אָמַר אַבָּיֵי, אַף תֵּכֶף לְתַלְמִיד חָכָם בְּרָכָה בְּמַעֲשֵׂה יְדֵיהֶם, שֶׁנֶּאֱמַר נִחַשְׁתִּי וַיְבָרֲכֵנִי וְגוֹ'. אִי בָּעִית אֵימָא מֵהָכָא, (בראשית לט, ה) "וַיְבָרֶךְ ה' אֶת בֵּית הַמִּצְרִי בִּגְלַל יוֹסֵף".