References from Vedic scripture about the law of karma
Where do we get our information? Here's some recommended further reading:
Bhagavad-gita, Introduction—We are suffering or enjoying the results of our activities from time immemorial, but we can change the results of our karma, or our activity, and this change depends on the perfection of our knowledge. We are engaged in various activities. Undoubtedly we do not know what sort of activities we should adopt to gain relief from the actions and reactions of all these activities, but this is also explained in the Bhagavad-gita.
Bhagavad-gita 18.66 (quoted in Bhagavad-gita's Introduction)—"Abandon all varieties of religion and just surrender unto Me. I shall deliver you from all sinful reactions. Do not fear." Thus the Lord takes all responsibility for one who surrenders unto Him, and He indemnifies such a person against all reactions of sins.
Bhagavad-gita 3.9—Work done as a sacrifice for Vishnu has to be performed; otherwise work causes bondage in this material world. Therefore, O son of Kunti, perform your prescribed duties for His satisfaction, and in that way you will always remain free from bondage.
Journey of Self-Discovery, 2.7—The word karma means, "work with some fruitive result." If we want to practice pure bhakti, we should work in Krishna consciousness selflessly—not just to get some profit out of it.
Bhagavad-gita 13.22—The living entity in material nature thus follows the ways of life, enjoying the three modes of nature. This is due to his association with that material nature. Thus he meets with good and evil among various species.
His Divine Grace A.C. Bhaktivedanta Swami Prabhupada, Sanand, India, December 27, 1975—"Karma means we act in some way under the direction of material energy or illusory energy, and we become implicated. It is stated in the Bhagavad-gita, According to our work and association with particular modes of nature, we get different types of bodies. If we give up the aim of achieving the favor of Vishnu (God), then we become implicated in the resultant action of our different activities."