Harmony
If you doubt what We have revealed to you, ask those who have read the Scripture before you. The truth has come to you from your Lord, so do not be among those who doubt.
10:94And if thou (Muhammad) art in doubt concerning that which We reveal unto thee, then question those who read the Scripture (that was) before thee. Verily the Truth from thy Lord hath come unto thee. So be not thou of the waverers.