Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: We were sitting with the Messenger of Allah (peace and blessings be upon him) when suddenly a young man appeared from the hills of al-Thaniyyah. When we saw him, we said: If only this young man's youth, vigour and strength were in the path of Allah Almighty! The narrator said: The Messenger of Allah (peace and blessings be upon him) heard what we said and said: "Is being killed in the path of Allah the only 'path of Allah'? Whoever serves his parents is in His path; whoever provides for his family is in the path of Allah Almighty; whoever guards his own self to keep it chaste is also in the path of Allah Almighty; and whoever strives to amass more wealth is on the path of Satan."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 17824