«كان يخرج في العيدين رافعا صوته بالتهليل والتكبير»
It was the practice of the Prophet (peace and blessings be upon him):
"He (peace and blessings be upon him) would go out on the two Eids raising his voice with the tahlil and takbir."
Hadith Referenceصحیح الجامع الصغیر / حرف الكاف / 4934