Refusal to commit injustice

قَالَ مَعَاذَ ٱللَّهِ أَن نَّأْخُذَ إِلَّا مَن وَجَدْنَا مَتَـٰعَنَا عِندَهُۥٓ إِنَّآ إِذًا لَّظَـٰلِمُونَ

He said, "[I seek] the refuge of Allāh [to prevent] that we take except him with whom we found our possession. Indeed, we would then be unjust."