Hacham Moshe David Walli, known as HaRaMa"D, son of Shmuel, was born in approximately 1697 in Padua, Italy.
He learned Torah from the sages of Padua. In 1726 he was ordained to the rabbinate, as was his friend and colleague, Hacham Moshe Haim Luzzato who become known as HaRaMHa"L. Hacham Moshe David Walli studied medicine at the Padua University and worked as a physician. He learned the wisdom of the Kabbala and for a certain period led HaRaMHa"L's group of kabbalists.
Hacham Moshe David Walli passed away on 7 Tevet, 5537 (1777) and was buried in Padua. He authored Beiur HaRaMa"d Walli, a commentary on the entire Bible; his Sepher Haliqutim covers on several different topics, including medicine. His writings also include a journal of his visions and a theological debate with Christians.