help with an older song

I am looking for the lyrics and chords to a song that I believe came out in the eighties, part of it is this:
Way down in Egypt land
When at the Lord's Command
The death angel of the Lord passed through...........

Then the chorus goes something like this:
Well, I'm covered by the blood
Yes, I'm covered by the blood
I am covered by the blood of the lamb

All my sinful past
upon the cross I cast
I am covered by the blood of the lamb.

I am sure that I have this all scrambled up, but is anyone familiar with this and/or can help locate the music for it??

Any help would really be appreciated!

[hookatee]

I don't know all the words...

Verse
Way down, in Egypt land
When at the Lord's command
the death angel of the Lord
come right on through
And the Lord did say that day,
as I go on my way,
when I see the blood,
I will pass, over you.

Chorus:
We're covered, by his blood
Yes we're covered, by his blood
We're covered, by the blood, of the lamb.
..........

Verse:
You may wonder why
these tears that fill my eyes
and why, I'm so happy that I'm free
.............