Part 1 of this poem is particularly known for being read at the funeral in Four Weddings and a Funeral. You can see a clip here.

I
Stop all the clocks, cut off the telephone,
Prevent the dog from barking with a juicy bone,
Silence the pianos and with muffled drum
Bring out the coffin, let the mourners come.

Let aeroplanes circle moaning overhead
Scribbling on the sky the message He Is Dead,
Put crêpe bows round the white necks of the public
doves,
Let the traffic policemen wear black cotton gloves.

He was my North, my South, my East and West,
My working week and my Sunday rest,
My noon, my midnight, my talk, my song;
I thought that love would last for ever: I was wrong.

The stars are not wanted now: put out every one;
Pack up the moon and dismantle the sun;
Pour away the ocean and sweep up the wood.
For nothing now can ever come to any good.

II

O the valley in the summer where I and my John
Beside the deep river would walk on and on
While the flowers at our feet and the birds up above
Argued so sweetly on reciprocal love,
And I leaned on his shoulder; ‘O Johnny, let’s play’:
But he frowned like thunder and he went away.

O that Friday near Christmas as I well recall
When we went to the Charity Matinee Ball,
The floor was so smooth and the band was so loud
And Johnny so handsome I felt so proud;
‘Squeeze me tighter, dear Johnny, let’s dance till it’s day’:
But he frowned like thunder and he went away.

Shall I ever forget at the Grand Opera
When music poured out of each wonderful star?
Diamonds and pearls they hung dazzling down
Over each silver and golden silk gown;
‘O John I’m in heaven,’ I whispered to say:
But he frowned like thunder and he went away.

O but he was fair as a garden in flower,
As slender and tall as the great Eiffel Tower,
When the waltz throbbed out on the long promenade
O his eyes and his smile they went straight to my heart;
‘O marry me, Johnny, I’ll love and obey’:
But he frowned like thunder and he went away.

O last night I dreamed of you, Johnny, my lover,
You’d the sun on one arm and the moon on the other,
The sea it was blue and the grass it was green,
Every star rattled a round tambourine;
Ten thousand miles deep in a pit there I lay:
But you frowned like thunder and you went away.

WH Auden