Daood bin Farqad, who says that I was seated in the house of Imam Jafar as- Sadiq (a.s.) when we saw a pigeon (called Zaghabi) humming.
Imam (a.s.) turned towards me and asked,
“O Dawood! Do you know what this bird is saying?”
I replied in the negative. Imam (a.s.) said,
“It curses the murderers of Imam Hussain (a.s.), thus preserve such pigeons in your houses.”
Ref: Nafasul Mahmoom, Section-2, Tradition no. 20