Abu Darda on Reciprocity: As you judge others, so you are judged

Abu Qilabah reported: Abu Darda, may Allah be pleased with him, said, “Be as you will, for as you judge you shall be judged.”

Source: al-Zuhd li-Aḥmad Ibn Ḥanbal 448

عَنْ أَبِي قِلابَةَ قَالَ قَالَ أَبُو الدَّرْدَاءِ رضي الله عنه كُنْ كَمَا شِئْتَ كَمَا تَدِينُ تُدَانُ

448 الزهد لأحمد بن حنبل