For all the day long - Continually. All my life.
Have I been plagued - Smitten; afflicted; troubled. My life has been a life of trial. I have not known prosperity.
And chastened every morning - Margin, as in Hebrew, "My chastisement was." That is, my sufferings - my trials - have been repeated with every returning morning. Each new day has brought some new form of affliction, designed to rebuke and punish me. I never have found exemption from trial even for a single day. So different is my lot from the lot of wicked people, who know nothing of this, and who are always prospered and happy. See the notes at Job 7:18.

For all the day long have I been plagued - Far from enjoying worldly prosperity, we are not only poor, but we are afflicted also; and every succeeding day brings with it some new trouble.

For all the day long have I been plagued,.... "Smitten or scourged" (p), as in Psalm 73:5, that is, afflicted of God; which is no ways inconsistent with his love, nor with his covenant, nor with an interest in him, as a covenant God and Father; see Psalm 89:29,
and chastened every morning; not in wrath, but in love, and for good; not with the chastisement of a cruel one, but of a loving and tender father; and therefore not to be improved in such a manner, as if on this account there was nothing in religion; whereas the daily notices the Lord takes of his people this way show his regard unto them, and care of them.
(p) "flagellatus", V. L. Pagninus, Montanus; "percussus", Gejerus.