Sayyiduna Abu Hurayrah (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him) said: "Whoever dies without having fought, and without the desire for jihad ever arising in his heart, dies upon one of the branches of hypocrisy."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 17941