This text comes from Songs of Innocence and of Experience (1826), a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
Transcription(contributor provided)
The Blossom.
Merry Merry Sparrow
Under leaves so green
A happy Blossom
Sees you swift as arrow
Seek your cradle narrow
Near my Bosom.
Pretty Pretty Robin
Under leaves so green
A happy Blossom
Hears you sobbing sobbing
Pretty Pretty Robin
Near my Bosom.