Shloka 45
अध्याय १६ — शङ्कर-उमा-वरदानम् तथा तण्डि-स्तुतिः (Śaṅkara–Umā Boon-Granting and Taṇḍi’s Hymn)
अयं च पितृयानानां चन्द्रमा द्वारमुच्यते । एष काष्ठा दिशश्वैव संवत्सरयुगादि च
ayaṃ ca pitṛyānānāṃ candramā dvāram ucyate | eṣa kāṣṭhā diśaś caiva saṃvatsarayugādi ca
风神伐由说道：“月神被称为行祖道（pitṛyāna）者之门。由他亦可推算时与方之分：诸方位、诸定点（kāṣṭhā），以及自年与劫（yuga）起的种种度量。”
वायुदेव उवाच
Educational Q&A
The verse links cosmic order with moral-ritual order: the Moon is presented as a key threshold for the pitṛyāna (ancestral post-mortem path) and as a regulator by which directions and major measures of time (year, yuga, etc.) are reckoned—implying that dharmic rites and the cosmos are coordinated through lunar order.
Vāyu is explaining cosmological structure: he identifies the Moon as the ‘gate’ for those who proceed along the ancestral route after death and states that the Moon is also the basis for reckoning directional points and temporal divisions such as the year and larger epochs.