Śatapatha Brāhmaṇa ("of a hundred paths") 5.2.1.18

5.2.1.18

athemāmupāvekṣamāṇo japati | namo mātre pṛthivyai namo mātre pṛthivyā iti bṛhaspaterha vā abhiṣiṣicānātpṛthivī bibhayāṃ cakāra mahadvā ayamabhūdyo 'bhyaṣeci yadvai māyaṃ nāvadṛṇīyāditi bṛhaspatirha pṛthivyai bibhayāṃ cakāra yadvai meyaṃ nāvadhūnvīteti tadanayaivaitanmitradheyamakuruta na hi mātā putraṃ hinasti na putro mātaram

Thereupon; while looking down upon this (earth), he mutters, Homage be to the mother Earth! homage be to the mother Earth!' For when Brihaspati had been consecrated, the Earth was afraid of him, thinking, 'Something great surely has he become now that he has been consecrated: I fear lest he may rend me asunder!' And Brihaspati also was afraid of the Earth, thinking, 'I fear lest she may shake me off!' Hence by that (formula) he entered into a friendly relation with her; for a mother does not hurt her son, nor does a son hurt his mother.