Tradition
St. Augustine
The Enarrations, or Expositions, on the Psalms
Psalm 66 › Section 7
7. Give them also those guards at the Tomb, let them recount what they have seen, let them take money and lie too....They too were added to the lie of the enemies: increased was the number of liars, that increased might be the reward of believers. Therefore they lied, “in the multitude of Your power” they lied: to confound liars You have appeared to men of truth, and You have appeared to those men of truth whom You have made men of truth.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)