Mukhtasar Bukhari (Abridged) 1288 — Going to jihad with parents’

Narrated Abdullah bin Umar (may Allah be pleased with them): A man came to the Prophet (peace be upon him) and asked his permission to participate in Jihad. The Prophet (peace be upon him) asked, "Are your parents alive?" He replied, "Yes." The Prophet (peace be upon him) said, "Then strive in their service." (Because they were old and helpless.)