It is related by Mu'az ibn Jabal (R.A.) that when his son died, the Messenger of Allah (SAW) had this letter of condolence sent to him: "In the Name of Allah, Most Kind, Most Merciful. "From Muhammad, the Messenger
of Allah, to Mu'az ibn Jabal. "Salaam Alaik! "First of all, I relate to you the Praise of Allah save whom there is no Deity. (After it), I pray that Allah may recompense you most bounteously on your loss, and endue
your hear with patience, and grant you and me the good fortune to be thankful (to Him) for his favors. Our lives and our possessions and our children are gifts of Allah and the trusts
He has placed in our charge (Your son, also, was a trust of Allah, given in your keeping). As long as He wished, He gave you the opportunity to profit from him with joy and make yourself
happy, and when He willed, He took the charge back from you. He is going to recompense with a vast reward. (There are glad tidings of) the special favour of Allah and benevolence and guidance from Him and if you show
patience, in confident expectation of the reward, and with the ideas of wholehearted surrender to His will. So, Mu'az, be patient, and let not bewailing and loud lamination ruin the recompense, and, then, you feel sorrow
and shame (at suffering the loss, and, yet remaining deprived of the reward). And, believe it no dead person returns (to the earth) by mourning and lamentation, nor does it lesson the grief. And the will of Allah
shall be done. In truth, it has been done already. Was-Salaam!" (Tabarani)
of Allah, to Mu'az ibn Jabal. "Salaam Alaik! "First of all, I relate to you the Praise of Allah save whom there is no Deity. (After it), I pray that Allah may recompense you most bounteously on your loss, and endue
your hear with patience, and grant you and me the good fortune to be thankful (to Him) for his favors. Our lives and our possessions and our children are gifts of Allah and the trusts
He has placed in our charge (Your son, also, was a trust of Allah, given in your keeping). As long as He wished, He gave you the opportunity to profit from him with joy and make yourself
happy, and when He willed, He took the charge back from you. He is going to recompense with a vast reward. (There are glad tidings of) the special favour of Allah and benevolence and guidance from Him and if you show
patience, in confident expectation of the reward, and with the ideas of wholehearted surrender to His will. So, Mu'az, be patient, and let not bewailing and loud lamination ruin the recompense, and, then, you feel sorrow
and shame (at suffering the loss, and, yet remaining deprived of the reward). And, believe it no dead person returns (to the earth) by mourning and lamentation, nor does it lesson the grief. And the will of Allah
shall be done. In truth, it has been done already. Was-Salaam!" (Tabarani)