Fa in kunta fee shakkim mimmaaa anzalnaaa ilaika fas'alil lazeena yaqra'oonal Kitaaba min qablik; laqad jaaa'akal haqqu mir Rabbika falaa takoonanna minal mumtareen
Now, if you are in doubt concerning what We have revealed to you, then ask those who have been reading the Book before you. It is the truth that has come to you from your Lord, so do never become one of those who doubt,