This isn’t a congregational hymn, but instead a chorus from the “Easter” part of Handel’s Messiah called “He trusted in God”. The words are based on the first part of Matthew 27:43 are simply:

He trusted in God, let him deliver him, if he delight in him.

I went with a recording of the English Concert Choir singing it because they had the perfect derisive tone. The pictures are from York Minster.