Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "Whoever commits a sin in this world and is punished for it, Allah is more just than to repeat the punishment upon His servants a second time; and whoever commits a sin in this world and Allah conceals it for him and pardons him, Allah is more generous than to go back on something He has already pardoned."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الأشربة والحد فيها / 17593