Jamieson-Fausset-Brown Bible Commentary
Ps 70:1-5. This corresponds to Ps 40:13-17 with a very few variations, as "turn back" (Ps 70:3) for "desolate," and "make haste unto me" (Ps 70:5) for "thinketh upon me." It forms a suitable appendix to the preceding, and is called "a Psalm to bring to remembrance," as the thirty-eighth [see on Ps 38:1, title].
Let them be ashamed and confounded that seek after my soul: let them be turned backward, and put to confusion, that desire my hurt.
Let them be turned back for a reward of their shame that say, Aha, aha.
Let all those that seek thee rejoice and be glad in thee: and let such as love thy salvation say continually, Let God be magnified.
But I am poor and needy: make haste unto me, O God: thou art my help and my deliverer; O LORD, make no tarrying.