《北史·列传·卷八十六》
次年中秋，在大泽中设帐屋，斋洁七日，祈请天神。
后岁仲秋，在大泽中施帐屋，斋洁七日，祈请天神。
In the middle of autumn of the following year, they set up tents and houses in Dazu, fasted and cleansed for seven days, and prayed to the gods of heaven.