At that very best auspicious moment..
At that very best auspicious moment, when prosperous instruments were echoed, when heavenly ladies were danced,on Indra*'s directive, the one with pure and generous fame, Arjuna hold the hands of the beautiful Subhadra.
Indra* : The god of Heaven, father of Arjuna.
[This specific scene is popularly known as 'Malayital' - putting the garlend. The marriage of Arjuna and Subhadra.]