Agnipurana 124.11

124.11

gandhonavījaḥ prāṇākhya iḍāśaktiḥ sthirā smṛtā /
ikāraś ca pratiṣṭhākhyo raso pālaś ca piṅgalā //

it is the seed of smell, named prāṇa; the iḍā channel is remembered as firm Śakti. / The letter I is named Pratiṣṭhā, taste, pāla, and piṅgalā;