SB 4.1.39

krator api kriyā bhāryā
 vālakhilyān asūyata
ṛṣīn ṣaṣṭi-sahasrāṇi
 jvalato brahma-tejasā
Word for word: 
kratoḥ — of the great sage Kratu; api — also; kriyā — Kriyā; bhāryā — wife; vālakhilyān — just like Vālakhilya; asūyata — begot; ṛṣīn — sages; ṣaṣṭi — sixty; sahasrāṇi — thousand; jvalataḥ — very brilliant; brahma-tejasā — by dint of the Brahman effulgence.
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.