וְרִוֵּיתִ֛י נֶ֥פֶשׁ הַכֹּהֲנִ֖ים דָּ֑שֶׁן וְעַמִּ֛י אֶת־טוּבִ֥י יִשְׂבָּ֖עוּ נְאֻם־יְהוָֽה׃ (ס)
And I will satiate the soul of the priests with fatness, And My people shall be satisfied with My goodness, Saith the LORD.
Read kabbalistic (mystical) interpretation of Jeremiah 31:14: and classical mystical sources.