The ground at the foot of the mountain is always washed by waves of milk that produce emeralds all around in the eight directions [north, south, east, west and the directions midway between them].
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
स चावनिज्यमानाङ्घ्रिः समन्तात्पयऊर्मिभिः । करोति श्यामलां भूमिं हरिण्मरकताश्मभिः
sa cāvanijyamānāṅghriḥ samantātpayaūrmibhiḥ | karoti śyāmalāṃ bhūmiṃ hariṇmarakatāśmabhiḥ
SB 8.2.4