I think these are the lyrics you're looking for:
1.
Well I may not be know theology as well as some other men,
But I know that Jesus shed His blood to pay for all my sins;
I know that up in heaven there's a book of life prepared,
And I know I'm bound for gloryland to a land beyond compare.
Chorus
And I know, I know, I know, yes I know.
My name is written there.
2.
Well I may not know the hour and I may not know the day,
But there's one thing I know for sure, I know He's on His way;
And I know that when they call the roll, I know I will not fret,
Because I know it's just a matter of time before my name is read.
Chorus
3.
Well I know I know without a doubt in my mind,
I know I'm His and He is mine.
I know, I know, yes I know, I know,
My name is written there.
I know, I know, yes I know, I know,
My name is written there.
Different groups tend to improvise the third verse and the chorus, but you get the idea
God bless!
Steve