1 Peter 2:22 - Matthew Poole's English Annotations on the Holy Bible

i.e. There was no guile in his mouth; it is a Hebraism; to be found is the same as to be, and not to be found the same as not to be, Genesis 2:20 Isaiah 39:2: see Romans 7:10. This signifies Christ's absolute perfection, in that he did not offend so much as with his mouth, James 3:2. The sense is, Christ was free from all manner of sin, and yet he suffered patiently; and therefore well may ye be content to suffer too, though wrongfully; seeing, though ye may be innocent in your sufferings, yet you come so far short of Christ's perfection.