Mayamatam 9.117

9.117

taddevasthānbabhāvajñairānītāni nidhāpayet
hemāyastāmrarūpyaiśca svastikāni caturdiśi

brought by those who know the nature of those deities' positions, one should have them deposited. / And with gold, iron, copper, and silver, swastikas [should be placed] in the four directions;