Agniveshyagrihyasutra 3.8.3.8

3.8.3.8

atha caturo nānāvṛkṣyān paridhīn paridadhāti mā tvā vṛkṣau saṃbādhiṣṭaṃ mā mātā pṛthivi tvam \

Then he encloses with four enclosing sticks made of different woods: 'May not the two trees press upon you, nor you, mother earth;