Shiva Purana
अपचारेण वेनस्य कोपस्तेषां महानभूत्॥ हुंकारेणैव तं जघ्नुर्मुनयो धर्मतत्पराः॥ १७॥
Due to the misbehaviour of Vena the pious sagos became very furious and killed him by very huṅkāra.
english translation
apacAreNa venasya kopasteSAM mahAnabhUt॥ huMkAreNaiva taM jaghnurmunayo dharmatatparAH॥ 17॥
hk transliteration by Sanscript