Manasara 18.91

18.91

saptabhāgaikahīnaṃ tu vistṛtaṃ jyotirmānataḥ
ṣaṭbhāgaikahīnaṃ tu vistāraṃ gaganasya smṛtam

diminished by one-seventh part in width by measure is the Jyotis;
diminished by one-sixth part is recorded as the width of the Gagana;