Sayyiduna Sahl bin Hunayf (may Allah be pleased with him) used to say: I have never seen anyone (more at loss) than one who does not hold his own opinion suspect. We set out with the Messenger of Allah (peace and blessings be upon him) intending Hajj; then, when we reached Makkah, he (peace and blessings be upon him) ordered us to make it an Umrah.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5593