Kshanti

Kshanti (Skt., kṣānti) or khanti (Pāli) is patience, forbearance and forgiveness. It is one of the practices of perfection (Skt./Pali: pāramitā) of both Theravāda and Mahāyāna Buddhism.

It is the practice of exercising patience toward behavior or situations that might not necessarily deserve it and is seen as a conscious choice to actively give patience as if a gift, rather than being in a state of oppression in which one feels obligated to act in such a way.

Read more about Kshanti:  Canonical Sources