प्रवर्तन्ते विधानोक्ताः सततं ब्रह्मवादिनाम्।।17.24।।
17.24 Therefore, acts of sacrifice, charity and austerity as prescribed through injunctions, of those who study and expound the Vedas, always commence after uttering the syllable Om.
17.24 After pronouncing Om, the Vedas are recited. Thus the connection of the syllable Om with the Vedas and the rituals enjoined in the Vedas such as sacrifices has been described. As the Vedas are connected with the word Om, all belonging to the three stations of life who memorise the Vedas and perform the rituals inculcated in them, are included in the expression, expounders of the Vedas. Now, He describes the manner by which the word Tat is connected with them:
Tasmaadomityudaahritya yajnadaanatapahkriyaah; Pravartante vidhaanoktaah satatam brahmavaadinaam.
tasmāt—therefore; om—sacred syllable om; iti—thus; udāhṛitya—by uttering; yajña—sacrifice; dāna—charity; tapaḥ—penance; kriyāḥ—performing; pravartante—begin; vidhāna-uktāḥ—according to the prescriptions of Vedic injunctions; satatam—always; brahma-vādinām—expounders of the Vedas