Sit on coals/ like a cat on hot bricks
Someone who sits in obvious tension; not at ease.
(Modern Hebrew, following the expression "walked on coals")
Translation
Expression (Hebrew)
יָשַׁב עַל גֶּחָלִים
Definition (Hebrew)
הַיֹּשֵׁב בְּמֶתַח מֻופְגָּן. הָיָה א שֶׁקֶט.
(הָעִבְרִית הַחֲדָשָׁה בְּעִקְבוֹת הַבִּטּוּי "הָלַךְ עַל גֶּחָלִים" )