When the Companions met on the day of Eid, they would say:

تَقَبَّلَ اللَّهُ مِنَّا وَمِنْكَ

Taqabbalallahu minna wa minka

May Allah accept it (good deeds) from us and you. In the case of plural, 'Minka' will be replaced by 'Minkum'.

Reference: Hasan (Ibn Hajar al-Asqalani). Fathul Bari: 2/517