Sunan Ibn Majah — Chapters on Hajj Rituals — Hadith No: 2893
Translation
It was narrated from Ibn ‘Umar that the Prophet (ﷺ) 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.”