لَا تُهْمِلِ الْأَمَانَةَ، لَا تُهْمِلِ الْأَمَانَةَ.
Do not neglect the trust; do not neglect the trust.
The repeated prohibition does not necessarily establish a second independent legal rule. It can intensify warning and aid retention if the listener faces a real danger of negligence. In a routine exchange without such a purpose, the same repetition might feel heavy or unnecessary.
One should not erase the distinction between a repeated expression and the broader rhetorical function of reinforcement. The test is whether the addition changes the listener's attention, memory, sense of urgency or understanding in a way suited to the situation.