He puts his hand into a wasp’s nest.
More Hungarian Proverbs:
Even the mother cannot understand the words of a dumb child.Hungarian
He succeeded like Bertok with the loach.
Hungarian
To be silent is golden, to speak is silvern.
Hungarian
One road leads to heaven but many lead to hell.
Hungarian
He does not even know whether it is a pumpkin or a curd-cake.
Hungarian
He guards it, him like his eyesight.
Hungarian