Pathamaahuneyyasutta 2.3

2.3

Idha, bhikkhave, bhikkhu cakkhunā rūpaṃ disvā neva sumano hoti na dummano, upekkhako viharati sato sampajāno.

It’s a mendicant who, when they see a sight with their eyes, is neither happy nor sad. They remain equanimous, mindful and aware.