Skandapurana 6.3.72.22

6.3.72.22

jātā dāsī na sandehaḥ śveto bhāskaravāhanaḥ .
uccaiḥśravā hayaḥ śveto na kṛṣṇo vidyate kvacit .. 72.22 ..

[They said,] 'You have become a slave, there is no doubt! The mount of the sun is white.
The horse Uccaiḥśravas is white, nowhere is he black.'