Lyrics:

They didn't need a driver
They walked a thousand miles
He left her on the roadside
He thumbed himself a ride

He swore he'd never leave her, he meant it till he did
He swore he'd never leave her, he meant it till he did
Before you say you're lucky, before you say he's good
Knock on wood

Broke you promise, broke your word

He's climbing up a ladder
Heaven had begun
He's found another angel
She'll take him down a rung or two

She swears she'll never leave him, she means it but she will
She swears she'll never leave him, she means it but she will
Before you say you're lucky, before you say she's good
Knock on wood

She swears she'll never leave him, she means it but she will
She swears she'll never leave him, she means it but she will
Before you say you're lucky, before you say she's good
Knock on wood

Broke your promise - Knock on wood
Broke your word - Knock on wood