Shiva Purana
उदङ्मुखः प्राङ्मुखो वा गच्छेस्सप्तपदाधिकम् ॥ किञ्चिद्दूरमथाचार्यस्तिष्ठ तिष्ठेति संवदेत् ॥ ७५॥
Go north or east for more than seven feet. Then, a little farther away, the teacher should converse, “Stay, stay.”
english translation
udaGmukhaH prAGmukho vA gacchessaptapadAdhikam ॥ kiJciddUramathAcAryastiSTha tiSTheti saMvadet ॥ 75॥
hk transliteration by Sanscript