"Song of the Indian Guest" or, less accurately, "Song
of India" from the Opera Sadko by Nikolai
Rimsky-Korsakov. It's sweet, peaceful and majestic.
Sadko (Russian: Садко,
the name of the main character) is an opera in seven
scenes by Nikolai Rimsky-Korsakov. The libretto was
written by the composer, with assistance from Vladimir
Belsky, Vladimir Stasov, and others. Rimsky-Korsakov
was first inspired by the bīlina of Sadko in 1867,
when he completed a tone poem on the subject, his Op.
5. After finishing his second revision of this work in
1892, he decided to turn it into a dramatic work. The
opera was completed in 1896.
The music is highly evocative, and Rimsky-Korsakov's
famed powers of orchestration are abundantly in
evidence throughout the score.