《北史·列传·卷七十七》
庾季才早晨奏呈 ：我仰观天象，俯察地理图记，龟甲裂纹重复，必将迁都。
季才旦奏： 臣仰观玄象，俯察图记，龟兆允袭，必有迁都。
Yu Jicai came to the court in the morning and reported, "I looked up to the heavenly phenomenon and looked down at the geographical map. The cracks on the tortoise shell are repetitive, and the capital must be moved."