Skandapurana 1.4.11.175

1.4.11.175

brahmacāri gururliṃgaṃ nāma coṣṇīṣiṇaṃ viduḥ..
alaktakaṃ ca yoginyo nāma cāsya subabhrukam.. 13.175 ..

the brahmacārins, the teacher as a liṅga, and knew the name “Turbaned One”;
the Yoginīs, a red-lac liṅga, and his name “Very Tawny”;