Fors seulement is a French chanson, popular as a basis for variations and as a cantus firmus. An early version, attributed to Johannes Ockeghem, is sometimes called Fors seulement l'attente to distinguish it from his similarly titled Fors seulement contre.
Brumel wrote a polytextual version, combining a tenor setting of Du tout plongiet with the words and superius from Ockeghem's Fors seulement l'attente for baritone.