The textually similar passage of the antiphon Sancta Maria succurre miseris (Cantus ID 004703) displays similarities with the C in the passage "sentiant omnes tuum iuvamen quicumque celebrant tuum natalem":
1--c--d--f---fe--d--gffe---e---d---fdfc--c----4
"sentiant omnes tuum levamen"
1---f--gh---hghkhg---fg---ghgfg---gf----eghf--e--f--efd--d--4
"quicumque celebrant tuum natalem." (http://cantusindex.org/id/004703)
This motet possibly quotes further pre-existing material, but it can not be linked to any Cantus prius factus with a corresponding text.
This motet is transmitted as a fragment.