સાપના દરમાં હાથ ઘાલવા; સાપના મ્હોમાં હાથ ઘાલવા.

sāpanā daramāṁ hātha ghālavā; sāpanā mhōmāṁ hātha ghālavā.

Literally: Putting a hand into a snake's hole; putting a hand into a snake's mouth.
What it means: Said of recklessly confronting a dangerous enemy directly on their own turf.
The English proverb Shah set beside it: To beard the lion in his den.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1921) · read from the scan by machine — the Gujarati itself is unchecked · English is machine-made and nobody has checked it yet

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.