Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 50

Sanskrit:

लिखन्त्यधोमुखी भूमिं पदा नखमणिश्रिया ।उवाच ललितां वाचं निरुध्याश्रुकलां शनै: ॥ ५० ॥

ITRANS:

likhanty adho-mukhī bhūmiṁpadā nakha-maṇi-śriyāuvāca lalitāṁ vācaṁnirudhyāśru-kalāṁ śanaiḥ

Translation:

She stood and scratched the ground with her foot, which was radiant with the luster of her gemlike nails. Her head bent down, she spoke in slow yet charming accents, suppressing her tears.

Purport:

Devahūti was so beautiful that her toenails appeared just like pearls, and as she scratched the ground it appeared as if pearls had been thrown on the ground. When a woman scratches the ground with her foot, it is a sign that her mind is very disturbed. These signs were sometimes exhibited by the gopīs before Kṛṣṇa. When the gopīs came in the dead of night and Kṛṣṇa asked them to return to their homes, the gopīs also scratched the ground like this because their minds were very disturbed.