אֲשֶׁ֨ר הָיָ֤ה דְבַר־יְהוָה֙ אֵלָ֔יו בִּימֵ֛י יֹאשִׁיָּ֥הוּ בֶן־אָמ֖וֹן מֶ֣לֶךְ יְהוּדָ֑ה בִּשְׁלֹשׁ־עֶשְׂרֵ֥ה שָׁנָ֖ה לְמָלְכֽוֹ׃
al quale fu rivolta la parola del Signore nei giorni di Giosia, figlio di Amon, re di Giuda, nel tredicesimo anno del suo regno.
Rashi
To whom the word of the Lord came Upon whom the Shechinah commenced to rest at that time.
Tze'enah Ure'enah
“The word of the Lord came to him, etc.” [1:2]. The Holy One spoke to Jeremiah in the days of Josiah the son of Amon the king of Judah. This was also in the days of Jehoiakim the son of Josiah the king of Judah.