the Infallible Imams peace be upon them have taught us to be moderate in worshiping. it is not necessary to be awake from the begining of night until midnight and perform about three hundred units of prayers; these kinds of worshiping is oppressing yourself. there is no need to last your afternoon and evening prayers for two hours, you should typically say your prayers with full attentions, in saying prayers what matters is the quality not the quantity
source : erfan.ir
