Kautilya's Arthashastra 7.6.27

7.6.27

jñātvā kalyāṇabuddhiṃ pūjayed, anyathābuddhim apakṛṣṭaṃ vāsayet //

Whoever returns deputed by the enemy; or of his own accord, with the intention of hurting his old master, as is natural to persons of such bad character; or coming to know that his old master is attempting to put down the enemy, his new master, and apprehensive of danger to himself; or looking on the attempt of his new master to destroy his old master as cruelty, these should be examined; and if he is found to be actuated with good motives, he is to be taken back respectfully; otherwise, he should be kept at a distance.