The only way to validate the Sunnah and why we should follow the Sunnah of Mohammad and the family of Mohammad is through Quran. So Quran is the greater of the weighty trusts, but we still need to follow the leaders it appoints and not turn away from their authority.
Quran command us to obey the Messenger and those who possess the authority from us.
Quran command us to obey the Messenger and those who possess the authority from us.