Srimad-Bhagavatam: Canto 5 - Chapter 1 - Verse 17
Sanskrit:
तथा वालिखिल्या ऋषयोऽङ्गुष्ठपर्वमात्रा: षष्टिसहस्राणि पुरत: सूर्यं सूक्तवाकाय नियुक्ता: संस्तुवन्ति ॥ १७ ॥
ITRANS:
tathā vālikhilyā ṛṣayo ’ṅguṣṭha-parva-mātrāḥ ṣaṣṭi-sahasrāṇi purataḥ sūryaṁ sūkta-vākāya niyuktāḥ saṁstuvanti.
Translation:
There are sixty thousand saintly persons named Vālikhilyas, each the size of a thumb, who are located in front of the sun-god and who offer him eloquent prayers of glorification.