tayos tat su-mahat karma
niśamya vibudhādayaḥ
mumucuḥ puṣpa-varṣāṇi
cakrur vādyāni tuṣṭuvuḥ
tayoh -- of the two brothers; tat -- that; su-mahat -- very great; karma -- act; nisamya -- hearing of; vibudha-adayah -- the demigods and other elevated living beings; mumucuh -- they released; pushpa-varshani -- downpours of flowers; cakruh -- they performed; vadyani -- music; tushtuvuh -- they offered prayers.
Srila Sanatana Gosvami comments that the demigods, great sages and other exalted beings were all astonished and ecstatic upon seeing the unusually swift and nonchalant way in which Krishna and Balarama killed the very powerful ass demons in the Tala forest.