Yes, I knew from research that it was Psalm 42; part of it, rather. But Psalm 42 has many more words than that one sentence, and the only Latin I recognized was Deus.

Thanks, zmjezhd. One more question, please? Is it a hard c or a soft c, in cervus? I'm guessing hard; if so, is it care-voos or curve-oos? Er, p'raps I'd better ask which one is closer to correct?

Branny, I googled Sicut cervus sheet music. I got lots of sites where you could print it out, but if you can't find one, holler and I'll get you one. Sounds like our piano-playing skills might be about on a par with each other. (About the same.)