Shiva Purana
पुनश्चैवंविधेनैव जपेन सुसमाहितः । शिवलोकादिभूतं हि कालचक्रमवाप्नुयात् १०५ ।
Again by a similar japa performed with concentration he attains Kālacakra, the first in the Śivaloka.
english translation
punazcaivaMvidhenaiva japena susamAhitaH । zivalokAdibhUtaM hi kAlacakramavApnuyAt 105 ।
hk transliteration by Sanscript