Harmony

Say, ‘O People of the Book, let us come to a common word between us, that we worship none but Allah, associate nothing with Him, and do not take one another as lords besides Him.’ But if they turn away, say, ‘Bear witness that we submit to Him.’

3:64Say: O People of the Scripture! Come to an agreement between us and you: that we shall worship none but Allah, and that we shall ascribe no partner unto Him, and that none of us shall take others for lords beside Allah. And if they turn away, then say: Bear witness that we are they who have surrendered (unto Him).

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.