"The Prophet said the Takbir in the first (Rak'ah) sever (times) before the recitation, and in the last, five (times) before the recitation."
Jami` at-Tirmidhi Book 5, Hadith 7
← Previous Hadith There is a another chain with similar narration.

Jami` at-Tirmidhi Book 5, Hadith 6 Next Hadith → "The Prophet went out on the day of Al-Fitr, so he prayed two Rak'ah, then he did not pray before it nor after it."

Jami` at-Tirmidhi Book 5, Hadith 8