Paraskaragrihyasutra 3.4.14

3.4.14

niṣkramya diśa upatiṣṭhate \ ketā ca mā suketā ca purastādgopāyetāmityagnirvai ketādityaḥ suketā tau prapadye tābhyāṃ namo 'stu tau mā purastādgopāyetāmiti \14\

He then goes out (of the house) and worships the quarters (of the horizon, the east) with (the formulas), 'May Ketâ (i.e. will?) and Suketâ (i.e. good-will?) protect me from the east.
'Agni is Ketâ; the Sun is Suketâ: to them I apply; to them be adoration; may they protect me from the east.'