Shatapatha Brahmana 2.1.4.21

2.1.4.21

ayaṃ vai yajño yo 'yam pavate | taṃ vai tathaiva hareyuryathainameṣa pratyaṅṅupācaretpratyaṅ haivainaṃ yajñaḥ praviśati taṃ kṣipre yajña upanamatyatha yasmātparāṅ bhavati parāṅu haivāsmādyajño bhavati sa yo hainaṃ tatrānuvyāharetparāṅsmādyajño 'bhūditīśvaro ha yattathaiva syāt

And, verily, the sacrifice is yonder blowing (wind). Let them, therefore, carry it in such wise that it turns towards him; for it is in the direction of him that the sacrifice enters him, that the sacrifice readily inclines to him. And from whomsoever it turns away, from him the sacrifice also turns away; and if any one were to curse him, saying, 'May the sacrifice turn away from him!' then he would indeed be liable to fare thus.