A closed mouth gathers no feet proverb
If you don't say anything at all, you can't say anything that is improper or makes you feel shy, uncomfortable, or ashamed.
John remained silent during the meeting as he knew that a closed mouth gathers no feet.
Afraid of saying something foolish, I stayed quiet during the meeting. A closed mouth gathers no feet, you know.
This proverb is a play on the idiom "put (one's) foot in (one's) mouth" (to say something stupid).
The inexplicable or concealed place or state indicates the afterlife.
I'm very sorry for your dad. He's beyond the veil.