Adhyaya 84: शिवव्रतकथनम्
Uma–Maheshvara Vrata, Shula-dana, and Month-wise Ekabhakta Vrata
लभते नात्र संदेहः सत्यं सत्यं वदाम्यहम् कार्तिक्यां वा तु या नारी एकभक्तेन वर्तते
labhate nātra saṃdehaḥ satyaṃ satyaṃ vadāmyaham kārtikyāṃ vā tu yā nārī ekabhaktena vartate
She surely attains the promised fruit—of this there is no doubt. Truly, truly I declare: any woman who, in the month of Kārttika, lives with ekabhakti, single-pointed devotion toward Pati (the Lord), is granted that grace.
Suta Goswami (narrating to the sages of Naimisharanya; conveying the phala-shruti of Kartika observance in a Shaiva frame)
It functions as a phala-shruti: during Kārttika, single-minded devotion to Shiva (often expressed through Linga-puja and vrata) is affirmed as certainly fruitful, emphasizing anugraha (Shiva’s grace) as the decisive factor.
By stressing certainty and “truth upon truth,” the verse highlights Shiva as Pati who grants assured results to the pashu when devotion becomes one-pointed—grace is not random but responds to steadfast inner orientation.
Kartika-vrata anchored in ekabhakti—practically, steady daily worship and disciplined conduct; yogically, ekāgratā (one-pointedness) that loosens pāśa (bondage) and turns the soul toward Pati.