It is narrated from Ibn Umar (may Allah be pleased with them both) that when he would go out towards the Eid ground on the day of Eid, he would recite the Takbeerat aloud.
Hadith Referenceمسند الإمام الشافعي / كتاب العيدين والأضاحي والاستسقاء / 476
Hadith Takhrijصحيح من غير هذا الطريق : اخرجه البيهقي : 3/ 278 - 279 - وابن ابی شیبة (5619)۔ والحاكم: 1/ 298۔