Note 23 — Chapter XVI · ON TO MATHURÂ OR MUTTRA. CONDITION AND CUSTOMS OF CENTRAL INDIA; OF THE MONKS, VIHÂRAS, AND MONASTERIES.
James Legge translation
There are six (sometimes increased to ten) pâramitâs, ‘means of passing to nirvâṇa:—Charity; morality; patience; energy; tranquil contemplation; wisdom (prajñâ); made up to ten by use of the proper means; science; pious vows; and force of purpose. But it is only prajñâ which carries men across the saṃsâra to the shores of nirvâṇa.’ Eitel, p. 90.