Of course Shakespeare was writing at the same time and folks were always saying 'I pray thee', were we would say 'I ask you'. These days, of course we don't often use 'pray' in this way, nor do we use the second person singular (thee), except for religious or poetic purposes. The language changes meaning over time, pays to remember that.
Thst’s true, but prayer language often retains those older, more traditional usages: “...who art in heaven,” etc.