'Rashly' in the Bible

Or if anyone swears [an oath] thoughtlessly or impulsively aloud that he will do either evil or good, in whatever manner a person may speak thoughtlessly or impulsively with an oath, but he is unaware of it, when he recognizes it, he will be guilty in one of these.

“[You said to me] ‘Who is this that darkens and obscures counsel [by words] without knowledge?’Therefore [I now see] I have [rashly] uttered that which I did not understand,Things too wonderful for me, which I did not know.

There is one who speaks rashly like the thrusts of a sword,But the tongue of the wise brings healing.

It is a trap for a man to [speak a vow of consecration and] say rashly, “It is holy!”And [not until] afterward consider [whether he can fulfill it].

So, since these things cannot be denied, you ought to be quiet and stay calm and not do anything rash.