Agniveshyagrihyasutra 3.8.2.27

3.8.2.27

atha kṣetravitṛṇṇyāṃ caturo loṣṭānupadadhāti utte tabhnomi pṛthivīṃ tvatparīmaṃ lokaṃ nidadhanmo aham̐riṣam \

Then he places four clods of earth in the divided field: 'I prop up the earth away from you; placing down this world, may I not come to harm.