 The Buddha preached the Four Noble Truths and the Dhammacakkappavattana Sutra, and they became the first five bhikkhus of the sangha.Assaji was the last to understand the teachings, and the Buddha had to give further explanations to him and Mahanama while the other three bhikkhus went out on alms round.He was the last to reach sotapanna, the first stage of arahanthood.