מִפְּרִ֣י פִי־אִ֭ישׁ תִּשְׂבַּ֣ע בִּטְנ֑וֹ תְּבוּאַ֖ת שְׂפָתָ֣יו יִשְׂבָּֽע׃
A man’s belly shall be filled with the fruit of his mouth; With the increase of his lips shall he be satisfied.
Read kabbalistic (mystical) interpretation of Proverbs 18:20: and classical mystical sources.