far be it for/from me to...

It is not one's place to do or say some particular thing. The phrase is often used as an introduction before saying or doing that very thing. Far be it from me to tell you how much to work on this report, but do you really think it's thorough enough? I think we need to believe what Shirley's saying—far be it from her to lie. If they want to give me a raise for doing the same amount of work, then hey, far be it from me to deprive them of the opportunity.

A disclaimer, often quite false. This expression, which basically means “I would not dream of doing/saying [something] when in truth I really would,” dates from the fourteenth century and has been a cliché for at least two hundred years. The earliest record is in John Wycliffe’s translation of Genesis (44:17): “Josephe answerede, Fer be it fro me, that Y thus do”; the King James Version has it “God forbid that I should do so.”