The following is a text from Mahāvagga, Vinaya:
‘‘Taṃ kiṃ maññatha, bhikkhave, rūpaṃ niccaṃ vā aniccaṃ vāti? Aniccaṃ, bhante. Yaṃ panāniccaṃ dukkhaṃ vā taṃ sukhaṃ vāti? Dukkhaṃ, bhante. Yaṃ panāniccaṃ dukkhaṃ vipariṇāmadhammaṃ, kallaṃ nu taṃ samanupassituṃ – etaṃ mama, esohamasmi, eso me attāti? No hetaṃ, bhante. Vedanā niccā vā aniccā vāti? Aniccā, bhante. Yaṃ panāniccaṃ dukkhaṃ vā taṃ sukhaṃ vāti? Dukkhaṃ, bhante. Yaṃ panāniccaṃ dukkhaṃ vipariṇāmadhammaṃ, kallaṃ nu taṃ samanupassituṃ – etaṃ mama, esohamasmi, eso me attāti? No hetaṃ, bhante. Saññā niccā vā aniccā vāti? Aniccā, bhante. Yaṃ panāniccaṃ dukkhaṃ vā taṃ sukhaṃ vāti? Dukkhaṃ, bhante. Yaṃ panāniccaṃ dukkhaṃ vipariṇāmadhammaṃ, kallaṃ nu taṃ samanupassituṃ – etaṃ mama, esohamasmi, eso me attāti? No hetaṃ, bhante. Saṅkhārā niccā vā aniccā vāti? Aniccā, bhante. Yaṃ panāniccaṃ, dukkhaṃ vā taṃ sukhaṃ vāti? Dukkhaṃ, bhante. Yaṃ panāniccaṃ dukkhaṃ vipariṇāmadhammaṃ, kallaṃ nu taṃ samanupassituṃ – etaṃ mama, esohamasmi, eso me attāti? No hetaṃ, bhante. Viññāṇaṃ niccaṃ vā aniccaṃ vāti? Aniccaṃ, bhante. Yaṃ panāniccaṃ, dukkhaṃ vā taṃ sukhaṃ vāti? Dukkhaṃ, bhante. Yaṃ panāniccaṃ dukkhaṃ vipariṇāmadhammaṃ, kallaṃ nu taṃ samanupassituṃ – etaṃ mama, esohamasmi, eso me attāti? No hetaṃ, bhante."
Why the “Yaṃ pana aniccaṃ…etaṃ mama, esohamasmi, eso me attāti” same for all five aggregates although vedanā and saññā are feminine gender and saṅkhāra is masculine gender, instead of “yā pana…yo pana…esā mama…eso mama… and so on”? Is there any grammatical reason behind this?