ʾEhad mi yodeʿa

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ʾEhad mi yodeʿa (Heb., ‘Who knows one?’). A concluding Passover song in the Ashkenazi rite. The aim of the concluding songs ‘is to keep children awake’ (B.Pes. 108b). It is a progressive number song and probably originated in Germany in the 15th cent.