The sentiment of compassion and tolerance, along with the pursuit of noble virtues, is taught in the ten Dharma (Dashlakshan Dharma). In particular:

• Uttam Kshama Dharma — Supreme Forgiveness (tolerance): this is the core teaching about practicing forbearance and compassion toward others.
• Uttam Mardav Dharma — Supreme Humility/Tenderness: complements forgiveness by fostering humility and gentleness.

Together, these are among the ten Dashlakshan (Daslakshan Dharma) that illumine the path of noble conduct. You can read more about the ten virtues here and general explanations of the Dashlakshan Parva.