tasyopanīyamānasya
sāvitrīṁ savitābravīt
bṛhaspatir brahma-sūtraṁ
mekhalāṁ kaśyapo 'dadāt
tasya - of Lord Vāmanadeva; upanīyamānasya - at the time of His being offered the sacred thread ceremony; sāvitrīm - the Gāyatrī mantra; savitā - the sun-god; abravīt - chanted; bṛhaspatiḥ - Bṛhaspati, the guru of the demigods; brahma-sūtram - the sacred thread; mekhalām - the belt of straw; kaśyapaḥ - Kaśyapa Muni; adadāt - offered.