There are different versions of these song lyrics around the internet, but this is the version I remember from my childhood. The obscure words and unexplained symbolism always seemed mysterious and dream-like to me.
I'll sing you one song
Green grow the rushes-o
What is your one song?
One is one and all alone and ever more shall be so
I'll sing you two songs
Green grow the rushes-o
What are your two songs?
Two, two, the lily-white boys
Dress them all in corduroys
One is one and all alone and ever more shall be so
I'll sing you three songs
Green grow the rushes-o
What are your three songs?
Three, three the rivals
Two, two, the lily-white boys
Dress them all in corduroys
One is one and all alone and ever more shall be so
I'll sing you four songs
Green grow the rushes-0
What are your four songs?
Four for the gospel makers
Three, three the rivals
Two, two, the lily-white boys
Dress them all in corduroys
One is one and all alone and ever more shall be so
I'll sing you five songs
Green grow the rushes-o
What are your five songs?
Five for the symbols at your door
Four for the gospel makers
Three, three the rivals
Two, two, the lily-white boys
Dress them all in corduroys
One is one and all alone and ever more shall be so
I'll sing you six songs
Green grow the rushes-o
What are your six songs?
Six for the six proud walkers
Five for the symbols at your door
Four for the gospel makers
Three, three the rivals
Two, two, the lily-white boys
Dress them all in corduroys
One is one and all alone and ever more shall be so
I'll sing you seven songs
Green grow the rushes-o
What are your seven songs?
Seven for the seven stars in the sky
Six for the six proud walkers
Five for the symbols at your door
Four for the gospel makers
Three, three the rivals
Two, two, the lily-white boys
Dress them all in corduroys
One is one and all alone and ever more shall be so
I'll sing you eight songs
Green grow the rushes-o
What are your eight songs?
Eight for the April rainers
Seven for the seven stars in the sky
Six for the six proud walkers
Five for the symbols at your door
Four for the gospel makers
Three, three the rivals
Two, two, the lily-white boys
Dress them all in corduroys
One is one and all alone and ever more shall be so
I'll sing you nine songs
Green grow the rushes-o
What are your nine songs?
Nine for the nine bright shiners
Eight for the April rainers
Seven for the seven stars in the sky
Six for the six proud walkers
Five for the symbols at your door
Four for the gospel makers
Three, three the rivals
Two, two, the lily-white boys
Dress them all in corduroys
One is one and all alone and ever more shall be so
I'll sing you ten songs
Green grow the rushes-o
What are your ten songs?
Ten for the ten commandments
Nine for the nine bright shiners
Eight for the April rainers
Seven for the seven stars in the sky
Six for the six proud walkers
Five for the symbols at your door
Four for the gospel makers
Three, three the rivals
Two, two, the lily-white boys
Dress them all in corduroys
One is one and all alone and ever more shall be so
I'll sing you eleven songs
Green grow the rushes-o
What are your eleven songs?
Eleven for the eleven who went to heaven
Ten for the ten commandments
Nine for the nine bright shiners
Eight for the April rainers
Seven for the seven stars in the sky
Six for the six proud walkers
Five for the symbols at your door
Four for the gospel makers
Three, three the rivals
Two, two, the lily-white boys
Dress them all in corduroys
One is one and all alone and ever more shall be so
I'll sing you twelve songs
Green grow the rushes-o
What are your twelve songs?
Twelve for the twelve disciples
Eleven for the eleven who went to heaven
Ten for the ten commandments
Nine for the nine bright shiners
Eight for the April rainers
Seven for the seven stars in the sky
Six for the six proud walkers
Five for the symbols at your door
Four for the gospel makers
Three, three the rivals
Two, two, the lily-white boys
Dress them all in corduroys
One is one and all alone and ever more shall be so
