What was the rewards did the monks get in the medieval time?

Since monks were forbidden to own anything, or have anything they might call their own, or receive anything from anyone without passing it to the superior of the monastery, the idea of monks being given any kind of reward is contrary to the Regula Benedicti (Rule of St Benedict).

Monks sought no reward and simply strove to be worthy to be taken into Heaven when they died; beyond that the idea of reward would be alien to them.