الكافي 2/1/58/3

3. Ali ibn Ibrahim has narrated from his father from Safwan ibn Yahya from Yahya al-Azraq from Hammad ibn Bashir from Abu ‘Abdillah عليه السلام who has said the following: “Allah, the Most Blessed, the Most High, is compassionate and He loves friendliness. Of the examples of His compassion to His worshippers is His reducing and easing off of their feeling grudge, resentment and hatred that confronts their wish and their heart. It is of the examples of His compassion toward them that He calls upon them to obey one of His commands to remove a certain evil (practice) from them for compassionate reasons so that the ring and the weight of belief do not fall upon them at once to make them weak. When He wants to make such a decision (of easing up on them) He cancels one command by another command and it becomes abrogated.”