«كان يكبر يوم الفطر من حين يخرج من بيته حتى يأتي المصلى»
It was the practice of the Prophet (peace and blessings be upon him):
"On the day of Eid al-Fitr, he (peace and blessings be upon him) would keep saying the takbir from the time he left his house until he reached the Eid prayer ground."
Hadith Referenceصحیح الجامع الصغیر / حرف الكاف / 5004