Samuel ben Kalonymus he-Hasid of Speyer (Hebrew: שמואל החסיד; 1120–1175),[1] was a Tosafist, liturgical poet, and philosopher of the 12th century, surnamed also "the Prophet".
He may also be the author of a liturgical poem entitled Shir ha-Yiḥud,[a] divided into seven parts corresponding to the seven days of the week.
This poem is a philosophical hymn on the unity of God, for which Ibn Gabirol's Keter Malkut served as the basis.
The Hebrew, if not very poetical, is pure; but foreign words are used for the philosophical terms.
The recitation of the poem was forbidden by Solomon Luria; but other rabbis, among whom was Samuel Judah Katzenellenbogen, who wrote a commentary on it, decided to the contrary.