The 6th and the 7th case-affixes are used after words when they are joined with svāmin 'master', īśvara 'lord', adhipati 'ruler', dāyāda 'an heir', sākṣin 'witness', pratibhū 'a surety' and prasūta 'begotten'.,
गवां गोषु वा स्वामी or ईश्वर 'master of cows.' So also गवामधिपतिः or गोष्वधिपतिः, गवां दायादः or गोषु दायादः, गवां or गोषु साक्षी प्रतिभूः &c.
These words naturally would have governed the Genitive; the present sutra ordains Locative as well.,