Arthashastra
श्वेत कुक्कुट अजगर लेण्ड योगः श्वेती करणम् ॥
The mixture of the dung of a white cock and ajagara (boa-constrictor) causes white colour.
english translation
zveta kukkuTa ajagara leNDa yogaH zvetI karaNam ॥
hk transliteration by Sanscript