נִמְצְא֤וּ דְבָרֶ֙יךָ֙ וָאֹ֣כְלֵ֔ם וַיְהִ֤י דבריך [דְבָֽרְךָ֙] לִ֔י לְשָׂשׂ֖וֹן וּלְשִׂמְחַ֣ת לְבָבִ֑י כִּֽי־נִקְרָ֤א שִׁמְךָ֙ עָלַ֔י יְהוָ֖ה אֱלֹהֵ֥י צְבָאֽוֹת׃ (ס)
Thy words were found, and I did eat them; And Thy words were unto me a joy and the rejoicing of my heart; Because Thy name was called on me, O LORD God of hosts.
Read halakhic rulings (Jewish law) on Jeremiah 15:16: and classical halakhic sources.