Aitareya-Aranyaka: Third Aranyaka, First Adhyâya, Fourth Khanda
1. Next follow the imprecations.
2. Let him know that breath is the beam (on which the whole house of the body rests).
3. If any one (a Brahmana or another man) should chide him, who by meditation has become that breath as beam, then, if he thinks himself strong, he says: “I grasped the breath, the beam, well; thou dost not prevail against me who have grasped the breath as the beam.” Let him say to him: “Breath, the beam, will forsake thee.”
4. But if he thinks himself not strong, let him say to him: “Thou couldst not grasp him who wishes to grasp the breath as the beam. Breath, the beam, will forsake thee.”
5. And whatever the reciter shall say to one who speaks to him or does not speak to him, depend upon it, it will come to pass. But to a Brahmana let him not say anything except what is auspicious. Only he may curse a Brahmana in excessive wealth. Nay, not even in excessive wealth should he curse a Brahmana, but he should say, “I bow before Brahmanas,”—thus says Suravira, Mandukeya.