Nachtlied (Night Song) Op. 138, No. 3, is a sacred motet for unaccompanied mixed choir by Max Reger. The German text is a poem by Petrus Herbert, beginning "Die Nacht ist kommen" (The night has come). The piece is in B minor and scored for five voices SATBB. Composed in Meiningen in 1914, it was published in 1916 after Reger's death as the third of Acht geistliche Gesänge (Eight Sacred Songs).