Exodus 34:4-7

So Moses cut two tablets of stone like the first ones, and he got up early in the morning and went up on Mount Sinai, as the LORD had commanded him, and took the two tablets of stone in his hand. Then the LORD descended in the cloud and stood there with Moses as he proclaimed the Name of the LORD. Then the LORD passed by in front of him, and proclaimed, “The LORD, the LORD God, compassionate and gracious, slow to anger, and abounding in lovingkindness and truth (faithfulness); keeping mercy and lovingkindness for thousands, forgiving iniquity and transgression and sin; but He will by no means leave the guilty unpunished, visiting (avenging) the iniquity (sin, guilt) of the fathers upon the children and the grandchildren to the third and fourth generations [that is, calling the children to account for the sins of their fathers].”