Psalm 109:8

Verse 8. Let his days be few. By "his days", he meant the days of his apostleship, which were few; since before the passion of our Lord, they were ended by his crime and death. And as if it were asked, What then shall become of that most sacred number twelve, within which our Lord willed, not without a meaning, to limit his twelve first apostles? he at once addeth, and let another take his office. As much as to say, let both himself be punished according to his desert, and let his number be filled up. And if any one desire to know how this was done, let him read the Acts of the Apostles. -- Augustine.

Verse 8. Let another take his office. So every man acts, and practically prays, who seeks to remove a bad and corrupt man from office. As such an office must be filled by some one, all the efforts which he puts forth to remove a wicked man tend to bring it about that "another should take his office", and for this it is right to labour and pray. The act does not of itself imply malignity or bad feeling, but is consistent with the purest benevolence, the kindest feelings, the strictest integrity, the sternest patriotism, and the highest form of piety. --Albert Barnes.

HINTS FOR PASTORS AND LAYPERSONS

Verse 8. Let his days be few. Sin the great shortener of human life. After the flood the whole race lived a shorter time; passion and avaricious care shorten life, and some sins have a peculiar power to do this, lust, drunkenness, & c.