佛祖統紀 3.83

3.83

From the eighth day of the second month, the Buddha attained the path. From the ninth to the twenty-ninth day, the three periods of seven days in the tranquil bodhimaṇḍa were completed. Reaching the sixth day of the third month, the samādhi by the water completed the four periods of seven days. On the seventh day of the third month, he received the food from the elder Trapuṣa; thereafter he went to the Deer Park, which was precisely within the fifth period of seven days, on the eighth day of the third month. The Nirvāṇa Sūtra says: "The initial birth, leaving home, attaining the path, and turning the wheel of the Dharma all occurred on the eighth day."