Skandapurana 1.4.39.142

1.4.39.142

aṃtareṇa na gacchena dvayorjvalanaliṃgayoḥ..
nāgnyorna viprayoścaiva na daṃpatyornṛpottama.. 41.142 ..

He must not pass between two blazing fires or liṅgas, / nor between two fires, nor between two brahmins, nor between a married couple, O best of kings;