Hasan al-Basri (may Allah have mercy on him) says: The Messenger of Allah (peace and blessings be upon him) was asked about the saying of Allah Almighty, "And Hajj to the House is a duty owed to Allah by the people, for whoever is able to find a way to it" [Surah Al Imran: 97]: what is the "way"? He (peace and blessings be upon him) said: "A mount and provision for the journey."
The correct view is that this narration from Hasan (may Allah have mercy on him) is mursal.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8639