佛祖統紀 53.132

53.132

魏正始。康居沙門康僧會入吳。吳主令求舍利。潔齋懇求三七日。鏗然有聲（云云）。

During the Zhengshi era of the Wei: The Sogdian monk Saṅghavarman entered Wu. The Lord of Wu ordered him to seek relics. After purifying himself with fasting and earnestly supplicating for three seven-day periods, there was a clinking sound (and so forth).