وَعَنْ عَبْدِ اَللَّهِ بْنِ عَمْرِوٍ رَضِيَ اَللَّهُ عَنْهُمَا
قَالَ: «جَاءَ رَجُلٌ إِلَى اَلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَسْتَأْذِنُهُ فِي اَلْجِهَادِ. فَقَالَ: «حَيٌّ وَالِدَاكَ?«, قَالَ: نَعَمْ: قَالَ: «فَفِيهِمَا فَجَاهِدْ»
Abdullah ibn Umar (RAA) narrated ‘A man came to the Messenger of Allah (sallallahu alayhi wa sallam) asking his permission to go out for Jihad. The Messenger of Allah (sallallahu alayhi wa sallam) asked him, ‘Are your parents alive?’ He replied, ‘Yes.’ The Messenger of Allah (sallallahu alayhi wa sallam) then said to him, ‘Then your Jihad would be with them (i.e. in looking after them and being at their service.).’ Agreed upon.’
Bulugh al-Maram 1452, Book 11, Jihad, Hadith 4. 1 min read