Fragments of Clemens Alexandrinus · Moschus: Spiritual Meadow, Book V. Chap. 176.

Yes, truly, the apostles were baptised, as Clement the Stromatist relates in the fifth book of the Hypotyposes. For, in explaining the apostolic statement, “I thank God that I baptised none of you,” he says, Christ is said to have baptised Peter alone, and Peter Andrew, and Andrew John, and they James and the rest.