Shiva Purana
॥ सूत उवाच ॥ इत्युक्त्वा तस्य पुत्राश्च चत्वारो बटुकास्तदा ॥ अभिषिक्ताश्चतुर्दिक्षु शिवेन परमात्मना ॥ ५२॥
Sūta said:— After saying this, the supreme soul Śiva consecrated his four sons as Vaṭukas in the four quarters.
english translation
॥ sUta uvAca ॥ ityuktvA tasya putrAzca catvAro baTukAstadA ॥ abhiSiktAzcaturdikSu zivena paramAtmanA ॥ 52॥
hk transliteration by Sanscript