This is an old Christian hymn written by Dr. Isaac Watts, an English pastor who lived in the late 17th and early 18th century. Watts wrote over 800 hymns during his lifetime.
Sweet is the day of sacred rest
No mortal care shall seize my breast
Oh, may my heart in tune be found
Like David’s harp of solemn sound
Now shall I share a glorious part
When grace has well defined my heart
And fresh supplies of joy are shed
Like holy oil to cheer my head
And fresh supplies of joy are shed
Like holy oil to cheer my head
Then shall I see, and hear, and know
All I desired and wished below
And every power find sweet employ
In that eternal world of joy
And every power find sweet employ
In that eternal world of joy
Dum da, da da...