Psalms 79:11

The sighing of the prisoner - The poor captive Israelites in Babylon, who sigh and cry because of their bondage.

Those that are appointed to die - תמותה בני beney themuthah , "sons of death." Either those who were condemned to death because of their crimes, or condemned to be destroyed by their oppressors. Both these senses apply to the Israelites: they were sons of death, i.e., worthy of death because of their sins against God; they were condemned to death or utter destruction, by their Babylonish enemies.