Albert Barnes Commentary Psalms 70:2

"Let them be put to shame and confounded That seek after my soul: Let them be turned backward and brought to dishonor That delight in my hurt." — Psalms 70:2 (ASV)

Let them be ashamed and confounded that seek after my soul - The only change here from (Psalms 40:14), is the omission of the word “together” which occurs there, and the omission of the words “to destroy it.”

Let them be turned backward, and put to confusion, that desire my hurt - This corresponds in the Hebrew entirely with (Psalms 40:14).