Kautilya's Arthashastra 7.4.20

7.4.20

teṣām asamavāye daṇḍam anyatamasmān niviṣṭāṃśena yāceta //

When the object aimed at is of a definite nature, then the share of spoils should be fixed; but when it is of a manifold or complex nature, then with no fixity in the share of the spoils. When no such combination is possible, he may request a king either to supply him with the army for a fixed share, or to accompany him for an equal share of the spoils.