Al-Fath · 48:15

15. Those whom Allah had kept behind - when you, O believers, set off to take the spoils of Khaybar which Allah had promised you after the Treaty of Hudaibiyya, will say: ‘Let us go out with you to get some of it.’ These people who were left behind want to change, by this request of theirs, Allah’s promise that He made to the believers after the Treaty of Hudaibiyya to give them alone the spoils of Khaybar. Say to them, O Messenger: You will never follow us to those spoils, because Allah has promised us that the spoils of Khaybar are only for those who were present at Hudaibiyya. They will say: Your preventing us from following you to Khaybar is not an instruction from Allah, but because you are jealous of us. The matter is not as these people who were left behind claim. Rather, they do not understand Allah’s instructions and prohibitions except a little, and therefore they have fallen into going against Him.