Du’aa’ in Eid prayer

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.