TantraS, 5, 14.0 tatra prāṇam uccicārayiṣuḥ pūrvaṃ hṛdaya eva śūnye viśrāmyati tato bāhye prāṇodayāt tato 'pi bāhyaṃ prati apānacandrāpūraṇena sarvātmatāṃ paśyati tataḥ anyanirākāṅkṣo bhavati tataḥ samānodayāt saṃghaṭṭaviśrāntim anubhavati tata udānavahnyudaye mātṛmeyādikalanāṃ grasate //

TantraS, 10, 14.0 karaṇatopasarjanakartṛbhāvasphuṭatvāt pañca śuddhakartṛbhāvāt pañca vigalitavibhāgatayā vikāsonmukhatve pañca sarvāvacchedaśūnyaṃ śivatattvaṃ ṣaṭtriṃśam //

TantraS, Dvāviṃśam āhnikam, 31.1 śūnyaṃ nirānandamayaṃ nirvṛtinijadhāmato 'rghaṃ ca /