וְאָמַר רַבִּי יוֹחָנָן מִשּׁוּם רַבִּי שִׁמְעוֹן בֶּן יוֹחַי: מִיּוֹם שֶׁבָּרָא הַקָּדוֹשׁ בָּרוּךְ הוּא אֶת עוֹלָמוֹ לֹא הָיָה אָדָם שֶׁהוֹדָה לְהַקָּדוֹשׁ בָּרוּךְ הוּא, עַד שֶׁבָּאתָה לֵאָה וְהוֹדַתּוּ, שֶׁנֶּאֱמַר: ״הַפַּעַם אוֹדֶה אֶת ה׳״.
And Rabbi Yoḥanan said in the name of Rabbi Shimon ben Yoḥai: From the day the Holy One, Blessed be He, created the world, no one thanked the Holy One, Blessed be He, until Leah came and thanked Him, as it is stated: “And she became pregnant and gave birth to a son, and she said, ‘This time I will give thanks to God,’ and thus he was called Judah” (Genesis 29:35).
Question 4
Alex taught us the special blessing that one says when seeing “multitudes of Israel” - how our faces and opinions are all different from one another. There are multitudes of texts that contain (the word) “multitudes.” Try narrowing your search to texts from the Talmud in Berakhot to find the exact blessing!