That is why Peter told the Jews at Pentecost to repent. In the context of Joel 2: 28, 29, we find that Joel too stresses repentance.
यहोवा ऐसे किसी भी व्यक्‍ति की नहीं सुनेगा जो रक्‍तदोषी है या जो पाप करता रहता है ।