John Gill Commentary James 3:10

"out of the same mouth cometh forth blessing and cursing. My brethren, these things ought not so to be." — James 3:10 (ASV)

Out of the same mouth proceeds blessing and cursing
Which is not only a contradiction, but unnatural, as well as wicked and sinful:

my brothers, these things ought not so to be :
in any, and much less in professors of religion: such things are unbecoming men, are a scandal upon human nature, and exceeding unworthy of the Christian name; see (Psalms 50:16Psalms 50:19Psalms 50:20) .