Du’aa’ in Eid prayer
Question

What is the du’aa’ in Eid prayer?
Praise be to Allah.We do not know of any du’aa’ that has been prescribed specifically for the Eid prayer or for the day of Eid; rather it is prescribed for the Muslims to recite Takbeer (“Allaahu akbar”), Tasbeeh (“Subhaan Allaah”), Tahleel (“Laa ilaaha ill-Allaah”) and Tahmeed (“al-hamdu Lillaah”) on the night before Eid and on the morning of Eid, until the end of the khutbah on the day of Eid al-Fitr and until the end of the days of Tashreeq on the occasion of Eid al-Adha, as is also prescribed during the first ten days of Dhu’l-Hijjah, because Allaah says concerning Eid al-Fitr (interpretation of the meaning): 
“(He wants that you) must complete the same number (of days), and that you must magnify Allaah [i.e. to say Takbeer (Allaahu Akbar: Allaah is the Most Great)] for having guided you”
[al-Baqarah 2:185]
And there are ahaadeeth and reports concerning that also.  
And Allaah is the Source of strength.