Kautilya's Arthashastra 7.9.38

7.9.38

nityaṃ vaśyaṃ laghūtthānaṃ pitṛpaitāmahaṃ mahat /
advaidhyaṃ ceti sampannaṃ mitraṃ ṣaḍguṇam ucyate //

Long standing, submissive, easy to be roused, coming from fathers and grandfathers, powerful, and never of a contradictory nature, is a good friend; and these are said to be the six qualities of a good friend;