Indeed, the believers are only those who have believed in Allah and His Messenger and when they are with him for a matter of recurring collective action, they don’t depart until they have asked his permission. Indeed, those who ask your permission, those are the ones who believe in Allah and His Messenger. So when they ask your permission for something of their affairs, then you grant them permission to whom you wish among them and ask forgiveness to Allah for them; Indeed, Allah is the Forgiving, Merciful.
Since Adhikr which is the Speech of the Lord is codified as the Best Interpretation of the Lord’s Book, one can become a believer only with It. It is told in verse 33: 6 that, the believer should give importance to Messenger than himself. But today any person even a believer if have any doubt in any matter should ask the author of Adhikr as explained in verses 16: 43-44 and 25: 59. See explanation 4: 63-65, 115; 6: 20 and 9: 43-44.