Tim Tebow to Russell Wilson -- 'Best of Luck' ... In No Sex Before Marriage Thing

Russell Wilson and Ciara have Tim Tebow's support in their vow to abstain from sex until marriage.

Of course, Tim has also famously sworn off sex until he ties the knot ... and Sunday at LAX, he told us he wishes the Seattle Seahawks QB and his GF "all the luck" when it comes to keeping it in their pants too.

BTW -- since Tim is essentially out of football, but still in insane shape, we asked if he'd ever consider training for the Olympics.