Hadith #2493 (Sunan Ibn Majah)
Book: The Chapters on Jihad
Narrator(s): Ahmed bin Sa'id bin Sakhar أحمد بن سعيد بن صخر, al-Zubair bin al-Kharrayt الزبير بن الخريت, Hiban bin Hilal حبان بن هلال, Lmazh bin Zbar al-Azdy al-Jhdmy لمازة بن زبار الأزدي, Sa'id bin Zayd

“I heard the Messenger of Allah (ﷺ) say: ‘Whoever equips a warrior in the cause of Allah until he is fully equipped, he will have a reward like his, until he dies or returns.”

Source: https://parallelquran.com/hadith/sunan-ibn-majah-2493/