St. Thomas Aquinas, In symbolum apostolorum 12.
Too bad that's not how the Leonine edition reads. Corpus Thomisticum re“prints" the 1954 Marietti edition, whereas the new (and standard critical) Leonine edition that Nicholas Ayo relied upon in the form of a pre-publication typescript in 1988 (Nicholas Ayo, C.S.C., The sermon conferences of St. Thomas Aquinas on the Apostles’ Creed, translated from the Leonine edition (University of Notre Dame Press, 1988; Wipf & Stock, 2005)) reads (or will read once published, if it hasn’t been already) somewhat differently:
Deus autem solus satiat, qui in infinitum excedit. . . .
Whereas God alone, who goes/passes on into infinity, satisfies.
Ayo: "God alone, who surpasses infinity, satisfies [us]. . . ."