Imam Malik (may Allah have mercy on him) said: When Aban bin Uthman became governor of Madinah during the reign of Abd al-Malik bin Marwan, he wanted to overturn a judgement that Ibn al-Zubayr (may Allah be pleased with them both) had made. Abd al-Malik bin Marwan wrote to Aban bin Uthman: We did not hold the judgements of Ibn al-Zubayr (may Allah be pleased with them both) against him; rather, what we held against him was his ambition for rulership. When my letter reaches you, carry out what Ibn al-Zubayr (may Allah be pleased with them both) decided and do not reverse it, for overturning judgements is wearisome toil.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب آداب القاضي / 20379