The New John Gill Exposition of the Entire BibleIsaiah 38:9
The writing of Hezekiah king of Judah…
The Septuagint and
Arabic versions call it a "prayer": but the Targum, much better,
``a writing of confession;''
in which the king owns his murmurings and complaints under his
affliction, and acknowledges the goodness of God in delivering him out
of it: this he put into writing, as a memorial of it, for his own
benefit, and for the good of posterity; very probably he carried this
with him to the temple, whither he went on the third day of his
illness, and hung it up in some proper place, that it might be read by
all, and be sung by the priests and the Levites; and the Prophet Isaiah
has thought fit to give it a place among his prophecies, that it might
be transmitted to future ages:
when he had been sick, and was recovered of his sickness;
his being sick F5"; on his sickness and recovery, which were the
subject matter of his writing, as the following show; though it is true
also of the time of writing it, which was after he had been ill, and
was well again.
F5 (wtwlxb) "in aegrotando ipsum", Montanus.