Mine eye trickleth down, and ceaseth not, without any intermission, Without any intermission - or else, 'because there is no intermission' (Piscator), namely, of my miseries. Verse 50. Till the Lord look down. His prayer it not without hope, wherein it differs from the blind grief of unbelievers.
Look down ... - (Isaiah 63:15, "Look down from heaven, and behold from the habitation of thy holiness and of thy glory: where is thy zeal and thy strength?")
Verse 51. Mine eye affecteth mine heart - i:e., causeth me grief with continual tears; or, 'affecteth my life' (literally, 'soul,' margin); i:e., my health (Grotius).
Because of all the daughters of my city - the towns around, dependencies of Jerusalem, taken by the foe. [Tsaddiy (ts)]