Shiva Purana
ततस्त्वाधाय सोऽदित्यां गर्भं तं शंसितव्रतः ॥ जगाम कश्यपस्तप्तुं तपस्संहृष्टमानसः ॥ ८ ॥
After impregnating Diti, Kaśyapa of noble sacred rites went away satisfied for the performance of penance.
english translation
tatastvAdhAya so'dityAM garbhaM taM zaMsitavrataH ॥ jagAma kazyapastaptuM tapassaMhRSTamAnasaH ॥ 8 ॥
hk transliteration by Sanscript