9:43 God pardons you; why did you give them leave before it became clear to you who are truthful, and who are lying?
9:44 Those who believe in God and the Last Day will not ask leave. They strive with their money and their lives. And God is aware of the righteous.
9:45 Those who ask leave are the ones who do not believe in God and the Last Day, and their hearts are in doubt. In their doubts they are wavering.
9:46 And if they had wanted to go then they would have taken all precautions for it, but God disliked them coming forth, so He made them lag behind, and they were told: "Stay with those who have stayed."
9:47 Had they come out with you they would have added nothing but disorder, and they would have hurried about seeking a test among you. There are some amongst you who listen to them. God is aware of the wicked.
9:48 Indeed, even before this time have they tried to stir up discord and devised all manner of plots against thee, [O Prophet,] until the truth was revealed and God's will became manifest, however hateful this may have been to them.
(Here again we see the divine plan of Allah at work. Allah knew that the prophet would give permission to those people, and on this occasion again everyone was made to face themselves)