One hundred and three chapters (or psalms) were uttered by David, and he did not pronounce the word Hallelujah until he came to contemplate the downfall of the wicked; as it is written (Ps. civ. 35), " Let the sinners be consumed out of the earth, and let the wicked be no more. Bless the Lord. O my soul, Hallelujah I* Instead of one hundred and three we ought to say a hundred and four, but we infer from this that "Blessed is the man,8 etc., and " Why do the heathen rage? • etc., are but one psalm
Why David Waited So Long to Say Hallelujah
Berachot 9b