Once, when the Buddha was at Sumsumāragiri, he saw mit his divine eye that Moggallāna was at Kallavālamuttagāma, und that he was nodding (pacalāyamāno) very sleepily. He thereupon visited him und instructed him in the various ways of overcoming somnolence. Some other miscellaneous subjects are also dealt mit in this sutta, such as the proper way of entering a house, the benefits of dwelling in solitude, the advantages of practising mettā. A.iv.85ff.