Shiva Purana
जयते पुण्यपापाभ्यां शंकरस्सुखदः सदा ॥ कदाचिच्च परीक्षार्थं दुःखं यच्छति वै शिवः ॥ ४०॥
Lord Śiva always gives happiness conquers both pious and sinful deeds Sometimes Lord Shiva gives pain for the sake of testing.
english translation
jayate puNyapApAbhyAM zaMkarassukhadaH sadA ॥ kadAcicca parIkSArthaM duHkhaM yacchati vai zivaH ॥ 40॥
hk transliteration by Sanscript