Rasarnava 12.297

12.297

lihyānmadhusamopetaṃ trisaptāhaṃ bṛhaspatiḥ
māsena śāstrasampattiṃ jñātvā devi balābalam
dvir aṣṭavarṣakākāraḥ sahasrāyur na saṃśayaḥ //

One should lick it with an equal amount of honey for three weeks, becoming a Bṛhaspati; / within a month, knowing the wealth of the treatises and strength and weakness, O Devī, / he takes the appearance of a sixteen-year-old and lives a thousand years, without doubt.