A prophet’s reward entails being called righteous, like the prophets, who represented divine righteousness (Matthew 5:10), and the disciples’ calling was similar to that of the prophets (Matthew 5:12). Those who receive the prophets share in their ministry and its rewards. There are different degrees of reward (Matthew 5:12, Matthew 5:19; Matthew 6:20), but God values all those who show hospitality to the disciples.
The task and calling of the disciples is very similar to that of the prophets (Matthew 5:12). They are called righteous because they represent divine righteousness (Matthew 5:10). Those who receive the prophets as righteous thereby acquire a share in the ministry and as such are rewarded. A distinction in the degrees of reward that each one receives is assumed here (see also Matthew 5:12, Matthew 5:19; Matthew 6:20). Jesus wants the disciples to know how greatly God values the hospitality shown to them.1
41 Celui qui reçoit un prophète en qualité de prophète recevra une récompense de prophète, et celui qui reçoit un juste en qualité de juste recevra une récompense de juste.