כִּ֗י בְּאֶחָד֙ לַחֹ֣דֶשׁ הָרִאשׁ֔וֹן ה֣וּא יְסֻ֔ד הַֽמַּעֲלָ֖ה מִבָּבֶ֑ל וּבְאֶחָ֞ד לַחֹ֣דֶשׁ הַחֲמִישִׁ֗י בָּ֚א אֶל־יְר֣וּשָׁלִַ֔ם כְּיַד־אֱלֹהָ֖יו הַטּוֹבָ֥ה עָלָֽיו׃
정월 초하루에 바벨론에서 길을 떠났고 하나님의 선한 손의 도우심을 입어 오월 초하루에 예루살렘에 이르니라
Rashi
they commenced to lay the foundations of the stacks The beginning of anything is called a foundation, like the foundation of a house, which is the beginning of the structure, and like the verse in Ezra (7:9) “that is the commencement of (יְסֻד) the ascent, etc.”