17.24 Tasmat, therefore; yajna-dana-tapah, kriyah, acts of sacrifice, charity and austerity-acts in the form of sacrifice etc.; vidhana-uktah, as prescribed through injunctions, as ordained by the scriptures; brahma-vadinam, of those who study and expound the Vedas; satatam, always; pravartante, commence; udahrtya, after uttering; om iti, the syllable Om.