פְּתַח־פִּ֥יךָ לְאִלֵּ֑ם אֶל־דִּ֝֗ין כָּל־בְּנֵ֥י חֲלֽוֹף׃
Open thy mouth for the dumb, in the cause of all such as are appointed to destruction.
Rashi on Proverbs
all whose help has passed Heb. בני חלוף. These are the orphans, whose help has passed and gone away.