By observing three nights or one night (of dedicated worship) in the prescribed manner, one can attain Shiva's supreme abode. According to their own caste and conduct, a person achieves what they deserve in this world.
All actions performed without desire (selflessly) directly lead to the supreme path of Shiva. One should perform them at three times of the day — morning, noon, and evening, in a proper sequence.
प्रातर्विधिकरं ज्ञेयं मध्याह्नं कामिकं तथा । सायाह्नं शांतिकं ज्ञेयं रात्रावपि तथैव हि ६४ ।
Morning is to be understood as the time for rituals (formal worship), Noon is associated with desires (personal or worldly desires), Evening is the time for peaceful devotion, and night is the same as evening, meant for peaceful worship.