130AD-202AD: Irenaeus quoted the second half of Acts 8:37👇

English translation: "Philip declared] that this was Jesus, and that the Scripture was fulfilled in Him; as did also the believing eunuch himself: and, immediately requesting to be baptized, he said, 'I believe Jesus Christ to be the Son of God.' 3... 3 [refers to Philip's quotation of] Acts viii. [8] 37"
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Greek: Τουτον είναι Ιησουν, και πεπληρωσθαι εν αυτώ γραφην, ως αυτός ο ευνούχος πεισθεις, και παραυτικα αξιων βαπτισθηναι, έλεγε Πιστεύω τον υιον του Θεού είναι Ιησουν Χριστον.
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Latin: Hunc esse Jesum, et impletam esse in eo Scripturam; Quemadmodum ipse Eunuchus credens, et statim postulans baptizari dicebat: Credo Filium Dei esse Jesum. Link
Irenaeus spoke Greek & Latin, and his quote exactly matches with Acts 8:37's words of "And he answered and said, I believe that Jesus Christ is the Son of God." (Acts 8:37 KJB) Ἀποκριθεὶς δὲ εἶπε, Πιστεὺω τὸν υἱὸν τοῦ Θεοῦ εἶναι τὸν Ιησοῦν Χριστόν. (Acts 8:37 Beza 1598 Textus Receptus/TR).