Surah 68. Al-Qalam, Ayah 32

Namely, His forgiveness.

 It is believed that Allah accepted their repentance and replaced their garden with a better one.

If the repentance was true, there was hope. For Allah often turns a great evil to our good. If not true, they only added hypocrisy to their other sins. The Parable presupposes that the garden came into the possession of selfish men, who were so puffed up with their good fortune that they forgot Allah. That meant that they also became harsh to their fellow-creatures. In their arrogance they plotted to get up early and defeat the claims of the poor at harvest time. They found their garden destroyed by a storm. Some reproached others, but those who sincerely repented obtained mercy. The "better garden" may have been the same garden, flourishing in a future season under Allah's gift of abundance.