The verse in Quran that is about Eid Al-Fitr.

*وَلِتُكَبِّرُوا اللَّهَ عَلَىٰ مَا هَدَاكُمْ وَلَعَلَّكُمْ تَشْكُرُونَ* 

and that you should exalt the greatness of Allah for His having guided you and that you may give thanks. 

This part of the verse is about the Takbirs recommended on the eve of Eid al-Fitr.

اَللَّهُ أَكْبَرُ اللَّهُ أَكْبَرُ لاَ إِلَهَ إِلاَّ اللَّهُ وَ اللَّهُ أَكْبَرُ اللَّهُ أَكْبَرُ وَ لِلَّهِ الْحَمْدُ الْحَمْدُ لِلَّهِ عَلَى مَا هَدَانَا وَ لَهُ الشُّكْرُ عَلَى مَا أَوْلاَنَا