Shiva Purana
तेन जपप्रभावेण सत्यं द्रक्ष्यसि शंकरम् ॥ आत्मतुल्यबलं पुत्रं लभिष्यसि महेश्वरात् ॥ ७ ॥
By the virtue of that mantra yon will see Śiva. You will acquire a son, equal in strength to you, by the favour of lord Śiva.
english translation
tena japaprabhAveNa satyaM drakSyasi zaMkaram ॥ AtmatulyabalaM putraM labhiSyasi mahezvarAt ॥ 7 ॥
hk transliteration by Sanscript