Literature Reference: ‘King Wen is above, shining in the heavens. Although Zhou is an old state, its destiny is renewed. The destiny of Zhou is not hidden, the decree of the Emperor is timely. King Wen ascends and descends, at the left and right of the Emperor. The decree is not easy, do not hinder it with your body. Proclaim and illuminate righteous inquiries, the Yu and Yin come from heaven. Heaven watches below, the decree is already gathered. In the early days of King Wen, heaven made a match. On the sunny side of the He River, on the banks of the Wei River. King Wen was pleased, the great state had a son. The great state had a son, she was like a sister of heaven. King Wen determined her auspiciousness, and personally welcomed her at the Wei River. They made boats as bridges, not displaying their glory. The decree came from heaven, it commanded this King Wen. In Zhou and in the capital, the daughter of the Shen family. The eldest son carried on, and King Wu was born. Protect and assist, the decree is yours, to attack the great Shang. The troops of Yin and Shang, their gathering was like a forest. They set forth in the wilderness of Mu, and I will rise. God is watching over you, do not doubt your heart. The wilderness of Mu is vast, the sandalwood chariots are bright, the four steeds are strong. Master Shang Fu, at that time was like a soaring eagle. Supporting King Wu, they attacked the great Shang, and the assembly was clear and bright.’ Source from 'The Book of Songs: Da Ya·King Wen'.