The superb australian coloratura soprano sings this aria from Lucia di Lammermoor, in a live performance at the Met, December 5, 1964.
The cast, according to the Met Archives was the following:

Metropolitan Opera House
December 5, 1964 Matinee Broadcast

LUCIA DI LAMMERMOOR {329}

Lucia...................Joan Sutherland
Edgardo.................Sándor Kónya
Enrico..................Nicolae Herlea
Raimondo................Bonaldo Giaiotti
Normanno................Robert Nagy
Alisa...................Carlotta Ordassy
Arturo..................Charles Anthony

Conductor...............Silvio Varviso

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Hope you enjoy this magnificent performance with Sutherland, a.k.a. La Stupenda!
Bye bye!

PS: The pics shown here might be from the perfomances from 1961, where she sang with Richard Tucker, since in this performance we listen she sang along Sándor Kónya