Singet dem Herrn ein neues Lied, BWV 225

Singet dem Herrn ein neues Lied (Sing unto the Lord a new song), BWV 225, is a motet by Johann Sebastian Bach. It was first performed in Leipzig around (probably) 1727. The text of the three-movement motet is in German: after Psalm 149 for its first movement (Psalms 149:1–3), the third stanza of "Nun lob, mein Seel, den Herren" (a 1530 hymn after Psalm 103 by Johann Gramann) for the second movement, and after Psalm 150:2 and 6 for its third movement Psalms 150:2,6.

The motet is described as being for double-choir (in other words eight voices divided into two four-part choirs). It may have been composed to provide choral exercises for Bach's students at the Thomasschule. The motet's biblical text would have been suited to that purpose. The final four-part fugue is titled "Alles was Odem hat" ("All that have voice, praise the Lord!").