Charles H. Spurgeon on Psalms 119:170

Let my supplication come before thee. It is the same entreaty with a slight change of words. He humbly calls his cry a supplication, a sort of beggar's petition; and again he asks for audience and for answer. There might be hindrances in the way to an audience, and he begs for their removal let it come. Other believers are heard let my prayer come before thee.

Deliver me according to thy word. Rid me of mine adversaries, clear me of my slanderers, preserve me from my tempters, and bring me up out of all my afflictions, even as thy word has led me to expect thou wilt do. It is for this that he seeks understanding. His enemies would succeed through his folly, if they succeeded at all; but if he exercised a sound discretion they would be baffled, and he would escape from them. The Lord in answer to prayer frequently delivers his children by making them wise as serpents as well as harmless as doves.