I think this is the first time I've posed hands interlocked like this. Twenty fingers, three joints per finger, three degrees of freedom per joint; that's 180 parameters arrrgh! Fortunately there's several of those parameters that shouldn't be used, but it's still a lot.
The main inspiration for the pose was panel 1 of page #934 (5-11-16) of the webcomic Collar6 by Steven Wallace. You can also find some of his work (tho not that particular page) on DeviantArt under the name Latex-Acolyte.