Muhammad bin Ahmad bin Yahya narrated from Abu Ja’far, from his father, from Wahb bin Wahb, from Imam Ja’far Al Sadiq عليه السلام, from his father Imam Al Baqir عليه السلام, who said: Imam عليه السلام said: "There is no harm if the droppings of chickens or pigeons come into contact with a garment."