赴汤蹈火（赴湯蹈火）　

◎ 赴汤蹈火 fùtāng-dǎohuǒ

[go through fire and water;be ready to risk one‘s own life;jump into the water and walk through fire] 形容不畏艰难险阻,奋不顾身

楚 越之俗好勇,则有赴汤蹈火之歌。—— 北齐· 刘昼《新论》