A very common worship song that's been sung by so many singers and bands, that I don't know who the original composer was. In my church's song book, it's printed as copyrighted to Dennis Jernigan. But even so, all credit goes to God, who is our all in all. Let's earnestly seek Him, for He willingly laid His life down for us on His own accord, John 10:18. The lamb that was slain is indeed worthy of our praise.