Matthew 17:5
New King James Version (NKJV)
5 While he was still speaking, behold, a bright cloud overshadowed them; and suddenly a voice came out of the cloud, saying, “This is My beloved Son, in whom I am well pleased. Hear Him!”.
From BibleGateway.com: http://www.biblegateway.com/passage/?search=Matthew+17:5&version=NKJV