Charles Ellicott Commentary Psalms 119:122

"Be surety for thy servant for good: Let not the proud oppress me." — Psalms 119:122 (ASV)

AIN.

Be surety. — Just as Judah became security for the safety of Benjamin (Genesis 43:9), so the psalmist asks God to be responsible for the servant who had been faithful to the covenant, and to stand between him and the attacks of the proud. So Hezekiah (Isaiah 38:14) asks God to undertake for him against the threat of death.

There is also, no doubt, the further thought that Divine protection would vindicate the loyal servant's profession of obedience, as in Job 17:3, where God is summoned as the only possible guarantee of the sufferer’s innocence. This verse and Psalm 119:132 are the only verses that do not actually mention the Law under one of its specific terms.