Erasmus (1466-1536) showed Tertullian (150-240AD) stated repentance is a change of mind, in Erasmus's Annotationes section of his 1527 Novum Testamentum (New Testament Annotations) edition.

Latin:
Graecae vocis elegantia annotavit Tertullianus lib[ro] adversus Marcione 2 [secundo]:
Nam & in Graeco, inquit, sono poenitentia nomen non ex delicti confessione, sed ex animi demutatione compositum est.

(Novum Testamentum, Annotationes, Page 18) Link & Link [& text only link at Page 154 Link ]

Tertullian translated into English:
Now in Greek the word for repentance is formed, not from the confession of a sin, but from a change of mind, which in God we have shown to be regulated by the occurrence of varying circumstances.

(Against Marcion, Book 2, [Section] 25 Link & Link & [Link at page 155]- extra information on Tertullian's works' copies)

𝕎𝕠𝕣𝕜𝕤-𝔹𝕒𝕤𝕖𝕕 𝕊𝕒𝕝𝕧𝕒𝕥𝕚𝕠𝕟𝕚𝕤𝕥

ℝ𝕖𝕡𝕖𝕟𝕥𝕒𝕟𝕔𝕖 𝔼𝕩𝕒𝕞𝕚𝕟𝕖𝕕