SHAFAQNA – Abu Ali Khaizarani narrated: I heard from my wife and her helper who said: When Imam Mahdi (AJ) was born, a light appeared in the sky and filled the whole of sky reaching the horizons. I saw with my own eyes white birds descending from the sky, rubbing their wings on his blessed face and body and then flew away. I went to Imam Askari (AS) and explained what I saw, Imam (AS) smiled and said: They are angels who descended to be blessed by the newly born (Tabarruk) who is blessed and when he will appear, they will be his companions and helpers .
 Beharul Anwaar, Vol. 51, page 5.