Shall they escape by iniquity? in your anger cast down the people, O God.
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Augustine of Hippo
AD 430
11. "For nothing Thou shalt save them" (ver. 7). He hath taught us even for these very men to pray. However "they shall sojourn and hide," however deceitful they be, however dissemblers and liers in wait they be; do thou pray for them, and do not say, Shall God amend even such a man, so evil, so perverse? Do not despair: give heed to Him whom thou askest, not him for whom thou askest. The greatness of the disease seest thou, the might of the Physician seest thou not? "They shall sojourn and hide: as my soul hath undergone." Undergo, pray: and there is done what? "For nothing Thou shalt save them." Thou shalt make them safe so as that nothing to Thee it may be, that is, so that no labour to Thee it may be. With men they are despaired of, but Thou with a word dost heal; Thou wilt not toil in healing, though we are astounded in looking on. There is another sense in this verse, "For nothing Thou shalt save them:" with not any merits of their going before Thou shall save them. ...They shall...
For nothing shalt thou save them. That is, since they lie in wait to ruin my soul, thou shalt for no consideration favour or assist them, but execute thy justice upon them. (Challoner)