9:83At-Tawba

“Allah has prepared (reward) for those who go out (to fight) in His cause: ‘And do not go out except (to fight) for Jihad in My cause, out of faith in Me and belief in My Messengers, but he has a guarantee from Me that I will admit him to Paradise, or I will return him to his dwelling from which he set out, with the reward that he attained, or the spoils that he acquired.’ Then he said: ‘By the One in Whose Hand is my soul, were it not that it would be too difficult for the Muslims, I would never have stayed behind from any expedition that went out in the cause of Allah. But I could not find the resources to give them mounts and they could not find the resources to follow me, nor would they be pleased to stay behind if I went. By the One in Whose Hand is the soul of Muhammad, I wish I could fight in the cause of Allah and be killed, then fight and be killed, then fight and be killed.’”

Allah's Messenger (ﷺ) returned from the Ghazwa of Tabuk, and when he approached Medina, he said, "There are some people in Medina who were with you all the time, you did not travel any portion of the journey nor crossed any valley, but they were with you they (i.e. the people) said, "O Allah's Messenger (ﷺ)! Even though they were at Medina?" He said, "Yes, because they were stopped by a genuine excuse."

We set out for Jihad in the cause of Allah and one of you lagged behind and shrieked like the bleating of a male goat and one of then (goats' gave a small quantity of milk. In case Allah gives me power over one of them, I will punish him (in such a way that it may have a deterrent effect upon others). In another narration transmitted on the authority of Sa'id b Jubair (the words are), that He (the Holy Prophet) turned him away four times."

Abu Sa’id Al Khudri said “The Apostle of Allaah(ﷺ) sent an expedition towards Banu Lihyan and said “One of the two persons should go forth. He then said to those who sat (at home), If any one of you looks after the family and property of a warrior, he will receive half the reward of the one who goes forth (in jihad).”

"Why did you go back?" He said: "I asked permission to enter three times, as the Messenger of Allah(ﷺ) enjoined upon us, then if we are given permission we should enter, otherwise we should go back." He said: "You should bring me proof of that, or else!" Then he came to a gathering of his people and asked them to swear by Allah concerning that, and they did so, so he let him go."