Sunan Ibn Majah, Volume 4, Book 25, Hadith 2893 (DarusSalam) ⓘ
It was narrated from Ibn ‘Umar that the Prophet said: “The one who fights in the cause of Allah, and the pilgrim performing Hajj and ‘Umrah are a delegation to Allah. He invited them, so they responded to Him, and they ask Him and He gives to them.”
حَدَّثَنَا مُحَمَّدُ بْنُ طَرِيفٍ، حَدَّثَنَا عِمْرَانُ بْنُ عُيَيْنَةَ، عَنْ عَطَاءِ بْنِ السَّائِبِ، عَنْ مُجَاهِدٍ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ ـ صلى الله عليه وسلم ـ قَالَ " الْغَازِي فِي سَبِيلِ اللَّهِ وَالْحَاجُّ وَالْمُعْتَمِرُ وَفْدُ اللَّهِ دَعَاهُمْ فَأَجَابُوهُ وَسَأَلُوهُ فَأَعْطَاهُمْ " .
also referenced under: Hadith 2893 (Reference) & Book 25, Hadith 3005 (In-Book)