One of these is the popular hymn, "It was at Midnight," which is still recited by "German" Jews at the home-service on the first eve of Passover.

It recounts in order the deliverances which, according to the Midrash, were wrought for Israel at midnight, from Abraham's victory over the four kings to the wakefulness of Ahasuerus, the crisis of the Book of Esther.

In the last stanza is a prayer for future redemption: Bring nigh the hour which is nor day nor night! Most High! make known that thine is day, and thine the night! Make clear as day the darkness of our night! As of old at midnight.
This form of versification, with a running refrain, afterwards became very popular with Jewish poets.

Jannai also displays the harsh alliterations, the learned allusions to Midrash and Talmud, which were carried to extremes by Kalir.
It is strange that it is impossible to fix with any certainty the date at which Jannai and Kalir lived.

Kalir may belong to the eighth or to the ninth century.