大比丘三千威儀 1.35

1.35

繞塔有五事：一者低頭視地、二者不得蹈虫、三者不得左右顧視、四者不得唾塔前地上、五者不得中住與人語。

In circumambulating a stūpa, there are five matters: first, lowering the head and looking at the ground; second, not stepping on insects; third, not looking around to the left and right; fourth, not spitting on the ground in front of the stūpa; fifth, not stopping midway to speak with people.