Here the word "thirsty" is a metaphor that means one's great desire for the things of God, just as one "thirsts" for water. AT: "Those who desire the things of God like a thirty man desires water" (See: [[rc://en/ta/man/translate/figs-metaphor]])
The word "drink" is a metaphor that means to receive the spiritual life that Jesus provides. AT: "let him come to me and quench his spiritual thirst" (See: [[rc://en/ta/man/translate/figs-metaphor]])
The "rivers of living water" is a metaphor that represents the life that Jesus provides for those who are spiritually "thirsty." AT: "spiritual life will flow like rivers of water" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Possible meanings are 1) "water that gives life" or 2) "water that causes people to live." (See: [[rc://en/ta/man/translate/figs-metaphor]])
# from his stomach
Here the stomach represents the inside of a person, specifically the non-physical part of a person. AT: "from inside of him" or "from his heart" (See: [[rc://en/ta/man/translate/figs-metonymy]])