(Genesis 12:4) "And Abram went, as the LORD had spoken to him, and Lot went with him." Lot was secondary to him. "And Abram was seventy-five years old when he departed from Haran" (Genesis 12:4). It is written, "And he was raising Hadassah" [that is, Esther] (Esther 2:7). The Holy One, blessed be He, said to Abraham: You went out from your father's house at seventy-five years of your life; the redeemer whom I will raise up from you will be seventy-five, the numerical value of "Hadassah."
Abram at Seventy-Five and the Redeemer Hinted in Hadassah
Yalkut Shimoni on Torah 66:1
(בראשית יב ד) וַיֵּלֶךְ אַבְרָם כַּאֲשֶׁר דִּבֶּר אֵלָיו ה' וַיֵּלֶךְ אִתּוֹ לוֹט. לוֹט טָפֵל לוֹ. וְאַבְרָם בֶּן חָמֵשׁ וְשִׁבְעִים שָׁנָה בְּצֵאתוֹ מֵחָרָן. כְּתִיב: "וַיְהִי אֹמֵן אֶת הֲדַסָּה". אָמַר הַקָּדוֹשׁ בָּרוּךְ הוּא לְאַבְרָהָם: אַתָּה יָצָאתָ מִבֵּית אָבִיךָ בֶּן חָמֵשׁ וְשִׁבְעִים שָׁנָה חַיֶּיךָ, גּוֹאֵל שֶׁאֲנִי מַעֲמִיד מִמְּךָ תִּהְיֶה בַּת חָמֵשׁ וְשִׁבְעִים שָׁנָה, מִנְיַן 'הֲדַאסָּה'.