Sylvester Sage has written:

'A farewell sermon' -- subject(s): American Sermons, Farewell sermons, Sermons, American

'A farewell sermon at Braintree, Mass., May 7, 1809' -- subject(s): Accessible book

Preserved Smith has written:

'A farewell sermon, preached at Rowe, June 10, 1804' -- subject(s): Farewell sermons

I don't think that is in the Quran. It is from the Prophet Muhammad (pbuh)'s farewell sermon.

Also, the farewell sermon (the one on wikipedia) is fake. the quote is not found any any Islamic books (the farewell sermon in wikipedia is not actually from an Islamic source but from the book by a Pakistani author, which schoalars say is fake)

The only complete sermon found in Islamic source is in Imam Tabiri's book

Select the link below labeled "Sources and related links:" for more information.

John Whitefield Doak has written:

'A farewell sermon' -- subject(s): American Sermons, Farewell sermons, Sermons, American

'A funeral sermon on the death of Mrs. Eliza Villar' -- subject(s): American Sermons, Funeral sermons, Sermons, American

John B. Johnson has written:

'A farewell sermon, delivered September 26th, 1802, in the North Dutch church, Albany' -- subject(s): Farewell sermons

'Eulogy on General George Washington' -- subject(s): Death and burial, Funeral and memorial services, Funeral sermons