You'll find it in Shakespeare AND in the King James' Bible.
We 'pray' -- that is, humbly ask -- those who are righteous and stand among the elders and martyrs offering the prayers (in the other sense) of the faithful, to add their prayers to ours and present them before the Throne of Grace.
A lawyer includes a "prayer for relief" on behalf of his client when he files a "pleading" with the court, but his client isn't praying to him in the worshipping sense, nor is he praying to the judge.
There is not enough evidence that they are there. Sainthood is not given by God. It’s given by the church.
A “saint” may be sleeping until the time of the Second Coming.