Elohekhem (Hebrew: אלהיכם) is a genre of piyyut, which arose among Jews in 12th-century Germany, to be inserted in the Qedusha of the Musaf prayer.
This name of this genre, meaning “your God”, comes from the closing word of Numbers 15:41: “...to be your God; I am the Lord your God.” A quote from the end of this verse appears in the Qedusha liturgy of Musaf in most Jewish prayer rites, including the Ashkenazic Rite.
The poets of Medieval Western Ashkenaz composed the Elohekhem piyyutim to be inserted in the liturgy immediately after this Biblical quote.
The Elohekhem genre is miniaturistic; the poems average a length of six to seven lines (though some are as short as four, and some as long as eighteen).
[2] Except for the piyyut for Berit Milah, each of these poems is signed either Judah (יהודה) or Samuel (שמואל) in the acrostic, presumably the names of the authors, but it is unclear who these authors are, for both of these names were popular in medieval Ashkenaz.