The Prophet ﷺ said: The warrior gets his reward, and the one who equips him gets his own reward and that of the warrior. (Using translation from Abū Dāʾūd 2526)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ «لِلْغَازِي أَجْرُهُ وَلِلْجَاعِلِ أَجْرُهُ وَأَجْرُ الْغَازِي»