Garudapurana 1.48.14

1.48.14

śannodevīti mantreṇa uttarasyāṃ caturthakam /
pūrve ambudavatkāryā āgnoyyāṃ dhūmarūpiṇī //

with the mantra beginning with "śaṃ no devīḥ", the fourth in the north. / In the east, [the banner] is to be made like a cloud; in the southeast, smoke-colored;