Shiva Purana
पश्चिमाभिमुखं ध्यात्वा यज्ञरक्षकमीश्वरम् ॥ अर्चयेदस्त्रवर्धन्यामस्त्रमीशस्य दक्षिणे ॥ २० ॥
One should meditate on the Supreme Personality of Godhead, who protects the sacrifice, facing west. One should worship the weapon on the right side of the Lord’s weapon.
english translation
pazcimAbhimukhaM dhyAtvA yajJarakSakamIzvaram ॥ arcayedastravardhanyAmastramIzasya dakSiNe ॥ 20 ॥
hk transliteration by Sanscript