Commentaire sur Les Psaumes 88:1

about the sick and afflicted one Heb. על-מחלתלענות, concerning the one sick with love and afflicted, for she is afflicted with the pains of the exile.

of Heman the Ezrahite One of the musicians who played a musical instrument, and the sons of Korah established this psalm that Heman should recite it on the “duchan” [the platform].

And the word "laanot"-- is like the phrase "qol anot" (Ex. 32:18). Said Yeshua b. Yehuda: "This is Heman the son of Samuel and the Bible calls him Ezrahi because he was a native of the bards, for most bards were his children and grandchildren as it is written in Chronicles." And some say that the aleph is prosthetic and he was the son of Zerah and his brother was Ethan. And others say that Heman and Ethan were brothers whose father was called Ezrah.