It is narrated from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) that a son of his died, and the Messenger of Allah (peace and blessings be upon him) wrote him a letter of condolence: "In the name of Allah, the Most Gracious, the Most Merciful. From Muhammad, the Messenger of Allah, to Mu'adh bin Jabal. Peace be upon you. I praise before you Allah, besides whom there is no god. To proceed: May Allah make your reward great, grant you patience, and grant us and you gratitude. Indeed, our lives, our wealth and our families are among the pure gifts of Allah, the Mighty and Majestic, and His trusts placed with us for a time. Allah gave you joy and delight through this son, and has now taken him back from you in return for a great reward. If you seek the reward (from Allah), then blessings, mercy and guidance from Allah are for you, so be patient. Let not your wailing and lamenting waste your reward, so that you come to regret it later. And know that weeping and wailing does not bring anything back, nor does it remove grief, and whatever decree is to descend will surely come to pass. Peace be with you." This hadith is gharib hasan, but Mujashi' bin Amr does not meet the condition of this book.