Found at the official Shel Silverstein web site:

YOU'RE ALWAYS WELCOME AT OUR HOUSE
(Shel Silverstein)

Well, a man came to our house, our house, our house.
A man came to our house to sell some brooms.
So we asked him to come in, and we hit him with a hammer,
And we hid him in the closet in my father's room.

CHO: But you're always welcome at our house any time of the day.
Yes, you're always welcome at our house, and we hope you will stay.

Then a lady came to our house, our house, our house.
A lady came to find out why I wasn't in school.
So we asked her to come in, and we gave her some poisoned lemonade,
And hid her in the freezer where it's nice and cool. CHO.

Then a kid came into our yard, our yard, our yard.
A kid came into our yard to get his ball.
We asked him to come in, and we took in the basement,
And we sealed him up inside the basement wall. CHO.

So when you come to our house, our house, our house,
When you come to our house, we'll have some fun.
We'll ask you to come in, and we'll take you in the kitchen,
And we'll put you in the oven until you're done. CHO.

And we know you will stay. ^^^