At that time Buddha preached the four laws of A-sa-wan, or the four bands that retain a being in the vortex of existences. From Kapilawot Buddha returned to Thawattie in the Dzetawon monastery. At that time a Nat had proposed four questions to his companions which they had not been able to answer. They were subsequently communicated to all the denizens of the six seats of Nats, but no one had been able to solve the difficulty. Not knowing what to do, they agreed to refer the particulars to the most excellent Buddha, then in the Dzetawon monastery. A deputation was forthwith sent to him with the view of proposing to him the puzzle, and entreating him to condescend to give the much-desired solution. The members of the deputation having duly paid their respects, said to him, "O most excellent Phra, which is the best thing to be bestowed in alms? Which is the most savoury and relishing of all things? Which is the most pleasurable? Which is the best and the fittest thing to put an end to passions?" To these four questions Buddha answered by one word--"The law." Addressing himself both to the Nats and to his assembled disciples, he added, "The giving of alms, though good in itself, cannot introduce a being into the path that leads to the deliverance. The law alone can afford such a benefit. The preaching of the law, and the exertions in communicating its knowledge to others, are therefore the most excellent alms. All that in this world confers pleasure to the senses is but a means to plunge man into the vortex of existences, and thereby into all miseries. On the contrary, the hearing of the law rejoices the heart to such an extent as often to open a spring of joyful tears; it destroys concupiscence, and leads gradually out of the whirlpool of existences. It establishes man in the state of Arahat, which is the end of all passions. The law, therefore, is the most savoury, the most pleasing thing, leading beings to the cessation of all miseries. You, my beloved disciples, exert yourselves in making known by your preaching the said law to all beings. This is the most excellent alms that you can bestow on the beings that inhabit the three different states of men, Nats, and Brahmas."