1. Áyatana Sutta.-Once when the Buddha was staying in the Kútágarasálá in Vesáli, he preached to the monks a sermon on the six spheres of contact (saláyatana). The monks listened with rapt attention until Mára, making a terrible din, disturbed their peace of mind. The Buddha admonished the monks not to be led away by Mára, and the latter, discomfited, disappeared (S.i.112).
2. Áyatana Sutta.-The four Ariyan truths are concerned with the six personal spheres of sense. Effort should be made to realise this. S.v.426.