In Al-Zuhd it is narrated that Uthman ibn Abdullah has quoted the following on the authority of the Immaculate Imams (a.s): “When the winter comes you are told that the
nights have become longer so that you may pray, and the days have been shortened so that you may fast, and if you cannot stay awake at night and cannot fight with your enemies and do not feel good about giving charity, remember God more often.”