Hiranyakeshigrihyasutra 2.7.17.9

2.7.17.9

syonā pṛthivi bhavānṛkṣarā niveśanī \ yacchā naḥ śarma saprathāḥ \ baḍitthā parvatānām \ iti dvābhyāṃ dakṣiṇaiḥ pārśvaiḥ saṃviśanti \9\

With (the verse), 'Be soft to us, O earth, free from thorns; grant us rest; afford us wide shelter' (Taitt. Ar. X, 1, 10), and with the two (verses), 'Verily of the mountains' (Taitt. Samh. II, 2, 12, 2. 3) they lie down on their right sides.