Shiva Purana
नेत्रे करशाखाभिः किंचित्संपीड्य यत्नतो योगी ॥ तारं पश्यन्ध्यायेन्मुहूर्तमर्द्धं तमेकभावोऽपि ॥ १८ ॥
The Yogin presses the eyes with the fingers a little and strives to see the star and meditate on it for a muhūrta or half that time with concentration.
english translation
netre karazAkhAbhiH kiMcitsaMpIDya yatnato yogI ॥ tAraM pazyandhyAyenmuhUrtamarddhaM tamekabhAvo'pi ॥ 18 ॥
hk transliteration by Sanscript