giveth. The cry of Proverbs 2:3 implies. Giver. Illustrations: Joseph (Genesis 41:38; Genesis 41:39); Moses (Exodus 4:12); Solomon (1 Kings 3:12; 1 Kings 4:29); Daniel (Proverbs 1:17. Pro 2:23); Stephen (Acts 6:5; Acts 6:10); Lydia (Acts 16:14); Paul's prayer (Ephesians 1:17; Colossians 1:9); John (1 John 5:20).
Out of His mouth.. phrase common in the prophets, but only here in Proverbs.
cometh. Supply Ellipsis from preceding clause "He giveth".