Srimad-Bhagavatam: Canto 4 - Chapter 1 - Verse 39

Sanskrit:

क्रतोरपि क्रिया भार्या वालखिल्यानसूयत ।ऋषीन्षष्टिसहस्राणि ज्वलतो ब्रह्मतेजसा ॥ ३९ ॥

ITRANS:

krator api kriyā bhāryāvālakhilyān asūyataṛṣīn ṣaṣṭi-sahasrāṇijvalato brahma-tejasā

Translation:

Kratu’s wife, Kriyā, gave birth to sixty thousand great sages, named the Vālakhilyas. All these sages were greatly advanced in spiritual knowledge, and their bodies were illuminated by such knowledge.

Purport:

Kriyā was the sixth daughter of Kardama Muni, and she produced sixty thousand sages, who were known as the Vālakhilyas because they all retired from family life as vānaprasthas.