Shatapatha Brahmana 10.3.5.14

10.3.5.14

etaddha sma vai tadvidvānpriyavrato rauhiṇāyana āha vāyuṃ vāntamānandasta ātmeto vā vāhito veti sa ha sma tathaiva vāti tasmādyāṃ deveṣvāśiṣamicedetenaivopatiṣṭhetānando va ātmāsau me kāmaḥ sa me samṛdhyatāmiti saṃ haivāsmai sa kāma ṛdhyate yatkāmo bhavatyetāṃ ha vai tṛptimetāṃ gatimetamānandametamātmānamabhisambhavati ya evaṃ veda

And Priyavrata Rauhinâyana, knowing this (truth), once spake unto the blowing wind, 'Thy soul is joy: blow thou either hither or thither!' and so, indeed, it now blows. Wherefore, if one desire to invoke any blessing from the gods, let him approach them with this, 'Your soul is joy,--my wish is such and such: let it be fulfilled unto me!' and whatever the wish he entertains, it will be fulfilled to him; for, assuredly, he who knows this attains this contentment, this successful issue, this joy, this soul.