Here the word "heart" refers to the thoughts and emotions. The phrase may indicate that the person stubbornly refuses to trust God. AT: "who refuse to trust in God" (See: [[rc://en/ta/man/translate/figs-metonymy]])
# store up their anger
Elihu speaks of a person remaining angry as if that person stored up their anger like one would store up treasure. AT: "are always angry" (See: [[rc://en/ta/man/translate/figs-metaphor]])
# even when God ties them up
Elihu speaks of God disciplining people as if God were tying them up with ropes. AT: "even when God punishes them" (See: [[rc://en/ta/man/translate/figs-metaphor]])