Shiva Purana
जपित्वा शक्तितो मूलं ध्यात्वा साम्बं त्रियम्बकम् ॥ अनुज्ञाप्य यथापूर्वं नमस्कृत्य कृताञ्जलिः ॥ ८१ ॥
After chanting the mantra with all your might, one should meditate on the root of Sāmba and Triyambaka. After giving permission he offered obeisances as before and offered obeisances with folded hands.
english translation
japitvA zaktito mUlaM dhyAtvA sAmbaM triyambakam ॥ anujJApya yathApUrvaM namaskRtya kRtAJjaliH ॥ 81 ॥
hk transliteration by Sanscript