This tune was written by Gustav Holst and was used as a part of his piece Jupiter. This particular part was also used in the song, “I Vow To Thee, My Country”, the Hymn “Jerusalem”, and Thaxted. It has been used and reused many times and is inspiring in each of them.
One rendition:
another rendition:
https://www.youtube.com/watch?v=VV9H2dk_qgY
the full Jupiter piece:
Enjoy!