From Pirates of Penzance, libretto by Sir William Gilbert, music by Sir Arthur Sullivan:

MABEL:
Ah, leave me not to pine
Alone and desolate;
No fate seemed fair as mine,
No happiness so great!
And Nature, day by day,
Has sung in accents clear
This joyous roundelay,
"He loves thee-- he is here.
Fa-la, la-la,
Fa-la, la-la.
He loves thee--he is here.
Fa-la, la-la, Fa-la."

FREDERIC:
Ah, must I leave thee here
In endless night to dream,
Where joy is dark and drear,
And sorrow all supreme--
Where nature, day by day,
Will sing, in altered tone,
This weary roundelay,
"He loves thee-- he is gone.
Fa-la, la-la,
Fa-la, la-la.
He loves thee-- he is gone.
Fa-la, la-la, Fa-la."
In 1940 I of age shall be,
I'll then return, and claim you--I declare it!

MABEL:
It seems so long!

FREDERIC:
Swear that, till then, you will be true to me.

MABEL:
Yes, I'll be strong!
By all the Stanleys dead and gone, I swear it!

BOTH:
Oh, here is love, and here is truth,
And here is food for joyous laughter:
He (she) will be faithful to his (her) sooth
Till we are wed, and even after.

FREDERIC:
Oh, here is love, and here is truth,

MABEL:
Oh, here is love, and here is truth,

FREDERIC:
She will be faithful to her sooth,

MABEL:
He will be faithful to her sooth,

FREDERIC:
Till we are wed, and even after,

MABEL:
Till we are wed,

FREDERIC:
And even after!

MABEL:
Yes, even after!

BOTH:
Oh, here is love, and here is truth,
And here is food for joyous laughter:
He (she) will be faithful to his (her) sooth

MABEL:
Till we are wed, and even after!

BOTH:
He (she) will be faithful to his (her) sooth,

FREDERIC:
Till we are wed, and even after, even after, even after!

BOTH:
Oh, here is love, and here is truth,
Oh here is love, is love