Kautilya's Arthashastra 9.3.36

9.3.36

yaḥ kopaṃ kartuṃ śamayituṃ vā śaktas tatropajāpaḥ kāryaḥ //

In the case of a person who is capable of causing or alleviating troubles, intrigue should be made use of; and in the case of a person who is of reliable character, able to undertake works, and to favour his ally in his success, and to afford protection against calamities, counter-intrigue (pratijápa) should be made use of (to keep his friendship secure). It should also be considered whether the person is of good disposition or of obstinate temper (satha).