Is it permissible to say: "If you are patient, you will be rewarded, and Allah's command is executed. And if you are distressed, you will have disbelieved, and Allah's command is executed. So be content with Allah's decree with a tranquil heart, trusting in Allah, and receive the immense reward and recompense for patience: (Indeed, the patient will be given their reward without account)"?

There is no problem with the phrases mentioned in the sentence, except that the declaration of disbelief (kufr) in the statement: "If you grow weary, you disbelieve," is incorrect. For indeed, discontent, impatience, and lack of perseverance in the face of calamity are fundamentally a sin, not disbelief, unless they occur in specific circumstances. The correct phrasing of the statement should be: "If you grow impatient, you commit a sin."