India (Buddhist Controversy, 220 A.D.)
"The Kushan Dynasty of North India called a famous council of Buddhist priests at Vaisalia to bring uniformity among the Buddhist monks on the observance of their weekly Sabbath.Some had been so impressed by the writings of the Old Testament that they had begun to keep holy the Sabbath."
Lloyd, The Creed of Half Japan, p. 23.
But the seventh day is the sabbath of the LORD thy God:
Exodus 20:10