3. Surely. ’ak (see on Ps. 62:1).
Turned. shub, “to return”; used here idiomatically in the sense of a repeated action and thus equivalent to the adverb “again.” The turning of the Lord’s hand against His people was repeated.
Note the succession of poetic figures that follows in amplification of 3, depicting the various types of punishments: 4, sickness; 5, siege; 6, darkness; 7-9, imprisonment; 10, 11, a beast of prey; 12, 13, a hunter.