2 Samuel 9:6-7 Now when Mephibosheth the son of Jonathan, the son of Saul, had come to David, he fell on his face and prostrated himself. Then David said, “Mephibosheth?” And he answered, “Here is your servant!” So David said to him, “Do not fear, for I will surely show you kindness for Jonathan your father’s sake, and will restore to you all the land of Saul your grandfather; and you shall eat bread at my table continually.”
God declared blessings and to multiply Abraham’ descendants. His children were blessed because of his faithfulness. Genesis 22:15-17 Then the Angel of the LORD called to Abraham a second time out of heaven, and said: “By Myself I have sworn, says the LORD, because you have done this thing, and have not withheld your son, your only son- blessing I will bless you, and multiplying I will multiply your descendants as the stars of the heaven and as the sand which is on the seashore; and your descendants shall possess the gate of their enemies.
There is also the adverse results of not doing good. Your lineage will be affected by your decisions today long after you are gone. Your carelessness might not affect you now but your children maybe affected by you actions today. Deuteronomy 5:8-9 “You must not make for yourself an idol of any kind, or an image of anything in the heavens or on the earth or in the sea. You must not bow down to them or worship them, for I, the LORD your God, am a jealous God who will not tolerate your affection for any other gods. I lay the sins of the parents upon their children; the entire family is affected-even children in the third and fourth generations of those who reject me.