It all started when God showed Himself and described His own characteristics to Moses on Mount Sinai.
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;
- who keeps lovingkindness for thousands,
- who forgives iniquity, transgression and sin;
- yet He will by no means leave the guilty unpunished,
- visiting the iniquity of fathers on the children and on the grandchildren to the third and fourth generations.
This declaration was often repeated by other authors in the Old Testament. Enjoy.
Grace. It's been there since the beginning.
Numbers 14:18 The LORD is slow to anger and abundant in lovingkindness, forgiving iniquity and transgression; but He will by no means clear the guilty, visiting the iniquity of the fathers on the children to the third and the fourth generations.'
Deuteronomy 4:31 For the LORD your God is a compassionate God; He will not fail you nor destroy you nor forget the covenant with your fathers which He swore to them.
Nehemiah 9:17 They refused to listen, And did not remember Your wondrous deeds which You had performed among them; So they became stubborn and appointed a leader to return to their slavery in Egypt. But You are a God of forgiveness, Gracious and compassionate, Slow to anger and abounding in lovingkindness; And You did not forsake them.
Psalm 86:15 But You, O Lord, are a God merciful and gracious, Slow to anger and abundant in lovingkindness and truth.
Psalm 103:8 The LORD is compassionate and gracious, Slow to anger and abounding in lovingkindness.
Psalm 108:4 For Your lovingkindness is great above the heavens, And Your truth reaches to the skies.
Psalm 145:8 The LORD is gracious and merciful; Slow to anger and great in lovingkindness.
Joel 2:13 And rend your heart and not (B)your garments " Now return to the LORD your God, For He is gracious and compassionate, Slow to anger, abounding in lovingkindness And relenting of evil.
Jonah 4:2 He prayed to the LORD and said, "Please LORD, was not this what I said while I was still in my own country? Therefore in order to forestall this I fled to Tarshish, for I knew that You are a gracious and compassionate God, slow to anger and abundant in lovingkindness, and one who relents concerning calamity.
Nahum 1:3 The LORD is slow to anger and great in power, And the LORD will by no means leave the guilty unpunished In whirlwind and storm is His way, And clouds are the dust beneath His feet.