Quotations and Literature Forum

I want to know who was the first to use the phrase or term 'Falling In Love.' Thanks to anyone who can help!

Some sources state: “first attested in 1423, colloquial usage.”
I could not find a source for this information, just references to it.
The first literary usage I could firmly establish is:

"From henceforth I will, coz, and devise sports. Let me see; what think you of falling in love?"
~ William Shakespeare, 'As You Like It' ( Act 1- Scene 2) [circa 1623]

Thanks alot!