Papias (~130)
n“And this the Presbyter used to say: Mark, indeed, since he was the interpreter of Peter, wrote accurately, but not in order the things either said or done by the Lord as much as he remembered.  For he neither heard the Lord nor followed him, but afterwards, as I have said Peter, who fitted his discourses to the needs but not as if making a narrative of the Lord’s sayings; consequently, Mark, writing some things just as he remembered, erred in nothing; for he was careful of one thing — not to omit anything of the things he heard or to falsify anything in them.”
nCited in Eusebius 3.39.15