Shiva Purana
षष्टिस्तानि सहस्राणि वालखिल्या इति स्मृताः ॥ अनूरोरग्रतो यांति परिवार्य दिवाकरम् ॥ २९ ॥
They were sixty thousand in number and known as Vālakhilyas. They surround the sun and go ahead of his charioteer.
english translation
SaSTistAni sahasrANi vAlakhilyA iti smRtAH ॥ anUroragrato yAMti parivArya divAkaram ॥ 29 ॥
hk transliteration by Sanscript