Go to now (see on James 4:13). The Vulgate there has ecce; here, agite. Ye rich men (see on James 2:6). Weep and howl, etc.; cf. James 4:9, but note the difference of tone; there, more of exhortation; here, more of denunciation.
ὀλολύζοντες: only here in the New Testament, but several times in the LXX., in passages of which the one before us reminds us; e.g. Isaiah 10:10; Isaiah 13:6; Isaiah 14:31; Isaiah 15:2; Isaiah 23:1-18.
1, 6, 14. Miseries. ταλαιπωρίαις: only again in Romans 3:16 (equivalent to Isaiah 59:7); frequent in the LXX.