Prince Siddhattha experienced anapana at age of 9 y.o

On the royal ploughing festival day, Siddhattha felt sad and pity on the lives of insects and other living existence victimized by the act of ploughing. He left the crowd of the ceremony and sat under a tree. He sat alone and began observing his breath - breath in, ... and breath out, ... after a while he experienced a deep silence. He mastered the first time the anapana practice at his age of 9 years old.