Let not them that wait on thee (or, hope in thee), O Lord God of hosts, be ashamed for my sake; or, through me (Revised Version); on my account (Kay)—as they would be if I, although thy faithful worshipper, were delivered into my enemies' hands.
Let not those that seek thee be confounded for my sake, O God of Israel. One of the many places where the second clause is a simple echo of the first.