(O Prophet!) Tell those of My servants who believe that they should establish Prayer and spend out of what We have provided them with, both secretly and openly, before there arrives the Day when there will be no bargaining, nor any mutual befriending. (14:31)
Narrated by: Anas
Abu Bakr wrote to me what Allah had ordered His Apostle (about Zakat) which goes: Neither an old nor a defected animal, nor a male-goat may be taken as Zakat except if the Zakat collector wishes (to take it).