In which writings does Tertullian apply the concept of satisfaction to salvation?

Everett Ferguson, in [*Church History*, I.21.IV](https://books.google.com/books?id=VB_StdsoDV4C&pg=PT458) , cites [Tertullian](https://en.wikipedia.org/wiki/Tertullian) (d. ~240) as a proto-satisfaction theory of atonement thinker: > The sacrificial or satisfaction theory had an initial statement by Tertullian, but found its classic formulation in Anselm. Where in Tertullian's writings does he make this "initial statement"? Which of his writings indicate an early form of [satisfaction theory](https://en.wikipedia.org/wiki/Satisfaction_theory_of_atonement) , as opposed to [other theories of atonement](https://en.wikipedia.org/wiki/Atonement_in_Christianity) ?