Thanks to Dr. John Roark for sharing this poem. I can't verify authorship. A nearly identical poem is attributed to James Patrick Erdman.
As years go on and heads turn gray
how fast the guests do go.
Touch hands, touch hands with those who stay -
young hands to old, strong hands to weak -
around the Thanksgiving board touch hands.
The False forget, the foe forgive, for every guest will go
and every fire burn low, and cabin empty stand.
Forgive, forget - for who may say Thanksgiving Day
will ever come again for friend or foe alike.