tatrākāśākhyaṃ tāvad dravyaṃ pareṇa sādhyate astyākāśākhyaṃ dravyaṃ nityam ekaṃ bhuviśabdaliṅgaṃ, śabdo 'sya guṇatvaliṅgam /
Among these, first the substance called Ākāśa is established by the opponent [thus]: "There exists a substance called Ākāśa, [which is] permanent, one, all-pervading, having sound as its indicator, and sound is the indicator of its being a quality."