Albert Barnes Commentary Psalms 109:28

"Let them curse, but bless thou: When they arise, they shall be put to shame, But thy servant shall rejoice." — Psalms 109:28 (ASV)

Let them curse, but bless thou - See Psalm 109:17. Let them continue to curse me, provided you will bless me. I am willing to bear all these reproaches, if I may have your favor. That favor I value infinitely more than I do theirs; and it is a small matter that I am reviled and cursed by people, if I may secure the favor and friendship of God.

When they arise - When they rise up against me; when they attempt to persecute me.

Let them be ashamed ... - Let them be disappointed; let them not be successful in their designs against me. On the word “ashamed,” see Job 6:20 (note); Psalms 25:2–3 (note).