Bodhicaryavatara (Entering the Path of Enlightenment), composed by the 8th-century Indian monk Shantideva
Bodhicaryavatara " (A Guide to the Bodhisattva Way of Life) by Shantideva is a seminal 8th-century Mahayana Buddhist text bodhicaryavatara sanskrit pdf top
If you prefer studying the Sanskrit alongside an English translation, these editions are highly recommended: Oxford World's Classics Bodhicaryavatara (Entering the Path of Enlightenment)