《尚书·虞书·舜典》
接着，举行祭天大典，向天帝报告继承帝位的事，又祭祀了天地四时，祭祀山川和群神。
肆类于上帝，禋于六宗，望于山川，遍于群神。
Then, he held a great ceremony to worship the Heavens, and reported his succession to the throne to the Emperor of Heavens. He also worshiped the Heavens and Earth, the four seasons, the mountains and rivers, and the spirits.