Shiva Purana
कृष्ण कृष्णशिखश्चैव कृष्णा स्यः कृष्णकण्ठधृक् ॥ इति तेऽव्यक्तनामानः शिवरूपाः सुतेजसः ॥२९॥
These brilliant beings in the form of Śiva had the clear names Kṛṣṇa, Kṛṣṇaśikḥa, Kṛṣṇāsya and Kṛṣṇakaṇṭha-dhṛk.
english translation
kRSNa kRSNazikhazcaiva kRSNA syaH kRSNakaNThadhRk ॥ iti te'vyaktanAmAnaH zivarUpAH sutejasaH ॥29॥
hk transliteration by Sanscript