Shiva Purana
क्रमान्मननपर्यंते साधनेऽस्मिन्सुसाधिते । शिवयोगो भवेत्तेन सालोक्यादिक्रमाच्छनैः २६ ।
When all the means upto Manana are well exercised, Śivayoga (unification with Śiva) results gradually through Sālokya etc.
english translation
kramAnmananaparyaMte sAdhane'sminsusAdhite । zivayogo bhavettena sAlokyAdikramAcchanaiH 26 ।
hk transliteration by Sanscript