Nafi' narrates from Sayyiduna Ibn Umar (may Allah be pleased with them both) that on the morning of Eid al-Fitr he would go out from the mosque to the Eid, saying the takbir in a loud voice; he would keep saying it until he reached the prayer ground, and would keep saying the takbir until the imam came.
This (as Ibn Umar's own practice, mawquf) is the correct version; it has also been narrated as the Prophet's own practice (marfu') through two weak chains.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب صلاة العيدين / 6129