The lay disciple Vāseṭṭha visits the Buddha at the Kūṭāgārasālā in Vesāli and states that it would be a good thing for them, for many a day, if his kinsmen, brahmins, trades folk, labourers, etc., kept the uposatha with the eightfold qualifications. The Buddha agrees, and says, further, that it would be good if not only gods and men but even the trees were to keep it. A.iv.258.