The word "their" refers to his friends. They are referred to by their "hearts" to emphasize their emotions. AT: "have kept them" or "have kept my friends" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
The person's children are referred to here by their "eyes." This phrase describes the children suffering because of what their father or mother did. AT: "his children will suffer for it" (See: [[rc://en/ta/man/translate/figs-synecdoche]] and [[rc://en/ta/man/translate/figs-explicit]])