This text comes from The Complete Poetical Works of John Greenleaf Whittier, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
With warning hand I mark Time’s rapid flight
From life’s glad morning to its solemn night;
Yet, through the dear God’s love, I also show
There ’s Light above me by the Shade below.
Stranger and traveller,
Drink freely and bestow
A kindly thought on her
Who bade this fountain flow,
Yet hath no other claim
Than as the minister
Of blessing in God’s name.
Drink, and in His peace go!