Kurdus reports that Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) used to say nine takbirs each in Eid al-Adha and Eid al-Fitr: first he would say four takbirs, then recite, then say one takbir and bow with it; then in the second rak'ah he would stand and first recite, then say four takbirs and bow with one of them.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9480