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śrotra-ākāśayoḥ saṃbandha-saṃyamāt-divyaṃ śrotram
From complete restraint of connection between ear and space; divine hearing
śrotra - sense of hearing; ear
ākāśa - space; ether; subtle and ethereal fluid; sky, atmosphere
saṃbandha - connection
saṃyama - complete restraint
divya - divine