Saṁyutta Nikāya - Saḷāyatana Vagga Saṁyutta Pāḷi. It deals mainly with the six sense organs or bases of contact named internal sense bases (eye, ear, nose, tongue, body and mind), six corresponding sense objects, known as external sense bases (visible form, sound, odour, taste, tangible things and mind-objects), and consciousness that arises in relation to each.