Sunan an-Nasa'i, Volume 4, Book 25, Hadith 3105 (DarusSalam) ⓘ
It was narrated that 'Abdullah bin 'Amr said: "A man came to the Messenger of Allah and asked him for permission to go for Jihad. He said: 'Are your parents alive?' He said: 'Yes.' He said: 'Then strive for their sake.'"
أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ سُفْيَانَ، وَشُعْبَةَ، قَالاَ حَدَّثَنَا حَبِيبُ بْنُ أَبِي ثَابِتٍ، عَنْ أَبِي الْعَبَّاسِ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو، قَالَ جَاءَ رَجُلٌ إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم يَسْتَأْذِنُهُ فِي الْجِهَادِ فَقَالَ " أَحَىٌّ وَالِدَاكَ " . قَالَ نَعَمْ . قَالَ " فَفِيهِمَا فَجَاهِدْ " .
also referenced under: Hadith 3103 (Reference) & Book 25, Hadith 19 (In-Book)