Buddhist uposatha had become a state institution in India. The custom was most strictly observed on the full moon and the day following. The third precept is about maintaining chastity. Buddhist tradition therefore requires lay people to be chaste on observance days, which is similar to the historical Indian tradition of being chaste on parvan days. As for the sixth rule, this means not having food after midday, with an allowance for fluids, in imitation of a nearly identical rule for monks. Physician Ming-Jun Hung and his co-authors have analyzed early and medieval Chinese Buddhist Texts and argue that the main purposes of the half-day fast is to lessen desire, improve fitness and strength, and decrease sleepiness. Historically, Chinese Buddhists have interpreted the eight precepts as including vegetarianism. The seventh precept is sometimes also interpreted to mean not wearing colorful clothes, which has led to a tradition for people to wear plain white when observing the eight precepts. This does not necessarily mean, however, that a Buddhist devotee dressed in white is observing the eight precepts all the time. As for the eighth precept, not sitting or sleeping on luxurious seats or beds, this usually comes down to sleeping on a mat on the floor. Though not specified in the precepts themselves, in Thailand and China, people observing the precepts usually stay in the temple overnight. This is to prevent temptations at home to break the eight precepts, and helps foster the community effort in upholding the precepts. History According to ethicist Damien Keown, the eight precepts were derived from the regulations described in the Brahmajala Sutta, an Early Buddhist Text. Since in this discourse the Buddha describes his own behavior, Keown argues that the eight precepts and several other moral doctrines in Buddhism are derived from the Buddha as a model figure. Religion scholar J. H. Bateson and Pāli scholar Shundō Tachibana have argued that the eight precepts may be partly based on pre-Buddhist brahmanical practices (vrata) during the fast on the full and new moon, but more recent scholarship has suggested that early Buddhist and Jain uposatha practices did not originate in Brahmanism. The brahmin poṣadha was held in preparation for a sacrifice, whereas the Buddhist and Jain practices were not. Also, according to some scholars, Brahmanism did not migrate to the early Buddhist region till some time after the advent of Buddhism. Instead, Asian religion scholar Benjamin