Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 19
Sanskrit:
आवर्तनोद्वर्तनकम्पितस्तन-प्रकृष्टहारोरुभरै: पदे पदे । प्रभज्यमानामिव मध्यतश्चलत्-पदप्रवालं नयतीं ततस्तत: ॥ १९ ॥
ITRANS:
āvartanodvartana-kampita-stana-prakṛṣṭa-hāroru-bharaiḥ pade padeprabhajyamānām iva madhyataś calat-pada-pravālaṁ nayatīṁ tatas tataḥ
Translation:
Because the ball was falling down and bouncing up, as She played with it Her breasts trembled, and because of the weight of those breasts and Her heavy flower garlands, Her waist appeared to be all but breaking at every step, as Her two soft feet, which were reddish like coral, moved here and there.