Muwatta Imam Malik (Riwayat Ibn al-Qasim)

And with this same chain (it is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him) that the Messenger of Allah, peace and blessings be upon him, said: "A man was walking on a path when he saw a thorny branch on the road, so he removed it from the path. Allah appreciated this and forgave him." And the Prophet, peace and blessings be upon him, said: "There are five types of martyrs: the one who dies of plague, the one who dies of a stomach illness, the one who drowns, the one who dies under a collapsed building, and the one who is martyred in the way of Allah." And the Prophet, peace and blessings be upon him, said: "If people knew what (reward) is in the call to prayer and the first row, and they had no way except to draw lots, they would draw lots. And if they knew how much (reward) there is in coming early for the Zuhr prayer, they would compete with each other to get ahead. And if they knew what (reward) is in the Isha and Fajr prayers, they would surely come, even if they had to crawl on their knees."