Natyashastra
वन्देत प्रथमं पूर्वां दिशं शक्राधिदैवताम् । द्वितीयां दक्षिणामाशां वन्देत यमदेवताम् ॥ ९३॥
He should first salute the eastern direction, with Indra as its presiding deity, and then the southern direction, with Yama as its presiding deity.
english translation
vandeta prathamaM pUrvAM dizaM zakrAdhidaivatAm । dvitIyAM dakSiNAmAzAM vandeta yamadevatAm ॥ 93॥
hk transliteration by Sanscript