Garudapurana 1.67.25

1.67.25

tatratatra samaṃ diśyādvātasyodayanaṃ sadā /
agrato vāmikā śreṣṭhā pṛṣṭhato dakṣiṇā śubhā //

in that very place one should always indicate equally the rising of the wind. / In front, the left is best; from behind, the right is auspicious;