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Thou shalt keep them, O Lord, thou shalt preserve them from this generation for ever. (Psalm 12:7)
Preserve them.
Literally, “preserve us, or “preserve him,” the two forms being identical in the Hebrew vowelless script. If the psalmist had the singular in mind he was placing distinct emphasis on the individual.
Shalt keep them.
 Those referred to in v. 5, those who are persecuted by deceitful men. God will guard and defend His saints (see Ps. 37).
Generation.
 The psalmist here refers to the race of flatterers, oppressors, liars, that were so numerous as to give the impression conveyed in v. 1.