Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
पूर्वार्द्धयुंजि षङ्भानि पौष्णभादुदभात्ततः ।मध्ययुंजि द्वादशर्क्षाणीन्द्रभान्नवभानि च ॥ १९१ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 191.
Six stars, from Revati, belong to the first half. Then twelve stars belong to the middle. Nine stars, from Indra's star,
Simple meaning: The 27 stars fall in three groups of six, twelve and nine.
परार्द्धयुंजि क्रमशः संप्रीतिर्दम्पतेर्मिथः ।
The three star groups show how husband and wife love each other. Six stars are short.
क्रमादितिद्विदैवत्या बृहत्ताराः पराः समाः ।
Short stars last 30 ghatikas, big ones 90 and the rest 60.
क्रमादभ्युदिते चंद्रे नयत्यर्घसमानि च ।
The Moon moves through these stars in turn. A list of clan-group stars begins.