Indra rode on the back of his carrier, Airavata, surrounded by all the demigods, while all the great sages offered him praise. Thus he shone very beautifully, pleasing the three worlds as he rode off to kill Vrtrasura

Expressions researched:
"Thereafter, King Indra very firmly took up the thunderbolt manufactured by Viśvakarmā from the bones of Dadhīci. Charged with the exalted power of Dadhīci Muni and enlightened by the power of the Supreme Personality of Godhead, Indra rode on the back of his carrier, Airāvata, surrounded by all the demigods, while all the great sages offered him praise. Thus he shone very beautifully, pleasing the three worlds as he rode off to kill Vṛtrāsura"

Srimad-Bhagavatam

SB Canto 6

Thereafter, King Indra very firmly took up the thunderbolt manufactured by Viśvakarmā from the bones of Dadhīci. Charged with the exalted power of Dadhīci Muni and enlightened by the power of the Supreme Personality of Godhead, Indra rode on the back of his carrier, Airāvata, surrounded by all the demigods, while all the great sages offered him praise. Thus he shone very beautifully, pleasing the three worlds as he rode off to kill Vṛtrāsura.

SB 6.10.13-14, Translation

Thereafter, King Indra very firmly took up the thunderbolt manufactured by Viśvakarmā from the bones of Dadhīci. Charged with the exalted power of Dadhīci Muni and enlightened by the power of the Supreme Personality of Godhead, Indra rode on the back of his carrier, Airāvata, surrounded by all the demigods, while all the great sages offered him praise. Thus he shone very beautifully, pleasing the three worlds as he rode off to kill Vṛtrāsura.