say obey allah and obey the messenger but if you turn away you should note it well that the messenger is responsible for the duty entrusted to him and you are responsible for the duty entrusted to you. if you obey him you will be rightly guided for the responsibility of the messenger is only to convey the message clearly to you.
قل أطيعوا الله وأطيعوا الرسول فإن تولوا فإنما عليه ما حمل وعليكم ما حملتم وإن تطيعوه تهتدوا وما على الرسول إلا البلاغ المبين