This is the du‘ā’ of our father Ādam (‘alayhis-salām) & mother Ḥawwā’ (‘alayhas-salām) after they had been lured by Shayṭān to eat from the tree.
What we can learn from this du‘ā’:
1. We should acknowledge our sins and shortcomings before asking for forgiveness...
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3. We should show our remorse and turn to Allah in humility, like our parents did...