In the hadith about secret charity, some transmissions interchange the positions of the left and right hands. Comparing the preserved wording with the reversal shows how even a small transposition changes the expression.
«حَتَّى لَا تَعْلَمَ شِمَالُهُ مَا تُنْفِقُ يَمِينُهُ»
So that his left hand does not know what his right hand has spent.
If another route instead gives a reversal such as «يَمِينُهُ مَا تُنْفِقُ شِمَالُهُ», the order of the two concepts is inverted. The same terms are present, but the preserved relation has changed.
Lesson: Fluency and a plausible meaning do not demonstrate accurate transmission. The exact wording must be checked against the stronger routes.