Sayyiduna Abu Umamah (may Allah be pleased with him) says: The Messenger of Allah (peace and blessings be upon him) said: "Whoever is not prevented by illness, an evident need or a tyrannical ruler, and yet does not perform Hajj, then let him die, if he wishes, as a Jew or as a Christian."
Although its chain is not strong, it has a supporting witness (shahid) in the saying of Umar bin al-Khattab (may Allah be pleased with him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8660