Matthew 27:54
New King James Version (NKJV)
54 So when the centurion and those with him, who were guarding Jesus, saw the earthquake and the things that had happened, they feared greatly, saying, “Truly this was the Son of God!”
From BibleGateway.com: http://www.biblegateway.com/passage/?search=matthew+27.54&version=NKJV