ешь пирог с грибами, да язык держи за зубами

Set phrase: a still tongue makes a wise head, give every man thine ear, but few thy voice, he knows much who knows how to hold his tongue, he that speaks sows, and he that holds his peace gathers, hear and see and be still (contrast: a fool's bell is soon rung. foolish tongues talk by dozen. your tongue is made of very loose leather), hear and see and say but little (contrast: a fool's bell is soon rung. foolish tongues talk by dozen. your tongue is made of very loose leather), hear much, speak little (do not be talkative), hold your tongue, keep your breath (or wind) to cool your broth (or porridge), let not your tongue run at rover, save your breath (or wind) to cool your broth (or porridge), there is a time to speak and a time to be silent