It was narrated that Khuraim bin Fatik said:"The Messenger of Allah (ﷺ) said: 'Whoever spends in the cause of Allah, it will be recorded for him seven hundred fold
Hadith No. 3186
Sunan an Nasai
Gradings:
Abu Ghuddah:
Sahih
Al-Albani:
Sahih
Zubair Ali Zai:
Sahih