Buddhist vegetarianism is the practice of vegetarianism by significant portions of Mahayana Buddhist monks and nuns (as well as laypersons) and some Buddhists of other sects. In Buddhism, the views on vegetarianism vary between different schools of thought. The Mahayana schools generally recommend a vegetarian diet because they claimed Gautama Buddha set forth in some of the sutras that his followers must not eat the flesh of any sentient being. Early Buddhist schools The earliest surviving written accounts of Buddhism are the Edicts written by King Ashoka, a well-known Buddhist king who propagated Buddhism throughout Asia, and is honored by both Theravada and Mahayana schools of Buddhism. The authority of the Edicts of Ashoka as a historical record is suggested by the mention of numerous topics omitted as well as corroboration of numerous accounts found in the Theravada and Mahayana Tripitakas written down centuries later. Asoka Rock Edict 1, dated to c. 257 BCE, mentions the prohibition of animal sacrifices in Ashoka's Maurya Empire as well as his commitment to vegetarianism; however, whether the Sangha was vegetarian in part or in whole is unclear from these edicts. However, Ashoka's personal commitment to, and advocating of, vegetarianism suggests Early Buddhism (at the very least for the layperson) most likely already had a vegetarian tradition (the details of what that entailed besides not killing animals and eating their flesh were not mentioned, and therefore are unknown). There is a divergence of views within Buddhism as to whether vegetarianism is required; with some schools of Buddhism rejecting such a requirement. Some Buddhists avoid meat consumption because of the first precept in Buddhism: "I undertake the precept to refrain from taking life". Other Buddhists disagree with this conclusion. Many Buddhist vegetarians also oppose meat-eating based on scriptural injunctions against flesh-eating recorded in Mahayana sutras.