Shiva Purana
वर्षाणामयुतं तप्त्वा ब्रह्मणो वरमाप सः ॥ न कश्चिन्मारयेन्मां वै त्वत्सृष्टाविति तुष्टतः ॥ १३ ॥
He performed penance for ten thousand years and propitiated Brahmā from whom he obtained the desired boon. “None of your creations shall kill me.”
english translation
varSANAmayutaM taptvA brahmaNo varamApa saH ॥ na kazcinmArayenmAM vai tvatsRSTAviti tuSTataH ॥ 13 ॥
hk transliteration by Sanscript