What instruments were used in the cradle song by johannes brahms?

Johannes Brahms's lullaby, titled "Wiegenlied" or "Brahms' Lullaby," is a classic piece for solo piano. It was composed in 1868 and published as part of his Op. 49 collection of five songs. The lullaby is typically performed on the piano, and its soothing melody and simple structure make it a popular choice for lulling infants to sleep.

Therefore, the only instrument used in Brahms's lullaby is the piano.