Deuteronomy 6:16 "Do not test the L-rd, your G‑d"

The prophets, who were messengers of HaShem, often gave promises or warnings of what would happen in the future.

Sometimes the prophets spoke of blessing and peace, sometimes they threatened the Jewish people with punishment if they did not do Teshuvah.

This prohibition warns us against trying to test to see if the promises or warnings of HaShem will come true.