We further know that in the sixth century B.C., Buddha preached his gospel in the language of the people, as opposed to that of the learned, in order that all might understand him. Thus all the oldest Buddhist literature dating from the fourth or fifth century B.C. was composed in the vernacular, originally doubtless in the dialect of Magadha (the modern Behar), the birthplace of Buddhism. Like Italian, as compared with Latin, this early popular speech is characterised by the avoidance of conjunct consonants and by fondness for final vowels. Thus the Sanskrit sutra, "thread," and dharma, "duty," become sutta and dhamma respectively, while vidyut, "lightning," is transformed into vijju. The particular form of the popular language which became the sacred idiom of Southern Buddhism is known by the name of Pali. Its original home is still uncertain, but its existence as early as the third century B.C. is proved beyond the range of doubt by the numerous rock and pillar inscriptions of Açoka. This dialect was in the third century B.C. introduced into Ceylon, and became the basis of Singhalese, the modern language of the island. It was through the influence of Buddhism that, from Açoka's time onwards, the official decrees and documents preserved in inscriptions were for centuries composed exclusively in Middle Indian (Prakrit) dialects. Sanskrit was not familiar to the chanceries during these centuries, though the introduction of Sanskrit verses in Prakrit inscriptions shows that Sanskrit was alive during this period, and proves its continuity for literary purposes. The older tradition of both the Buddhist and the Jain religion, in fact, ignored Sanskrit entirely, using only the popular dialects for all purposes. But in course of time both the Buddhists and the Jains endeavoured to acquire a knowledge of Sanskrit. This led to the formation of an idiom which, being in the main Prakrit, was made to resemble the old language by receiving Sanskrit endings and undergoing other adaptations. It is therefore decidedly wrong to consider this artificial dialect an intermediate stage between Sanskrit and Pali. This peculiar type of language is most pronounced in the poetical pieces called gatha or "song," which occur in the canonical works of the Northern Buddhists, especially in the Lalita-vistara, a life of Buddha. Hence it was formerly called the Gatha dialect. The term is, however, inaccurate, as Buddhist prose works have also been written in this mixed language.