Shiva Purana
पतिं तं विषमं कण्ठे निदधे विषमुल्बणम् ॥ रेजेतेनाति स विभुर्नीलकण्ठो बभूव ह ॥ ७ ॥
The lord retained obliquely the acute poison that he drank, in his neck. He shone much thereby and became Blue-necked.
english translation
patiM taM viSamaM kaNThe nidadhe viSamulbaNam ॥ rejetenAti sa vibhurnIlakaNTho babhUva ha ॥ 7 ॥
hk transliteration by Sanscript