Shiva Purana
सुमित्रा च शिवं प्रीत्या कैकेयी नृपवल्लभा॥ पूजयामास सत्पुत्रप्राप्तये मुनिसत्तम ॥ ३४ ॥
O excellent sage, Sumitrā, and Kaikeyi the beloved queens, performed the worship of Śiva with pleasure for the acquisition of good sons.
english translation
sumitrA ca zivaM prItyA kaikeyI nRpavallabhA॥ pUjayAmAsa satputraprAptaye munisattama ॥ 34 ॥
hk transliteration by Sanscript