Sayyiduna Muharrish al-Ka'bi (may Allah be pleased with him) said: "The Messenger of Allah (peace and blessings be upon him) performed Umrah from al-Ji'ranah, then returned as though he had spent the night there." That is why his Umrah remained hidden from many people.
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17902