To beat one's breast and weep tears of blood; describes being overwhelmed by deep sorrow or extreme grief.

literally meaning to cut open one's liver and weep tears of blood; describes being in a state of extreme sadness or inward suffering

(idiom) mourning for one's parents; an expression used in an obituary or by a grieving family to express deep gratitude to those attending a funeral by weeping and touching their forehead to the ground