In The Little Office of the Blessed Virgin Mary there is a sermon by Saint Aelred in the Sunday Lauds ( Sermo 2, in Nativitate beatae Mariae:PL 195, 322-324) which is an optional Second Reading and where I found the phrase:
Praise the Lord in his holy ones, say the Scriptures. I've brought this up in a discussion with an individual who does not believe in the existence of patron saints (they are dead---they can't talk to you---ask St. John what he meant in Revelation---you can't can you?---cause he's dead ---neener neener neener!

)
So I bring up this phrase and my friend tells me
it is not in Scripture so I m hoping someone here can tell me where I can find a citation to show that Saint Aelred wasn't fibbing(oh yes, according to my friend Saints are the dead stoogies of the Catholic Church don'tcha know

)so we can move on with our discussion(or at least put my friend on the defensive)
Thank you!