TantraS, Dvāviṃśam āhnikam, 43.2 śūnyāśūnyālayaṃ kuryād ekadaṇḍe 'nalānilau //

HYP, Caturthopadeśaḥ, 3.2 amaratvaṃ layas tattvaṃ śūnyāśūnyaṃ paraṃ padam //

HYP, Caturthopadeśaḥ, 37.2 mudreyaṃ khalu śāmbhavī bhavati sā labdhā prasādād guroḥ śūnyāśūnyavilakṣaṇaṃ sphurati tat tattvaṃ padaṃ śāmbhavam //