1 Corinthians 10:9-10

We must not tempt the Lord [that is, test His patience, question His purpose or exploit His goodness], as some of them did—and they were killed by serpents. [Num 21:5, 6] And do not murmur [in unwarranted discontent], as some of them did—and were destroyed by the destroyer. [Num 16:41, 49]