(now rare) Alternative form of postehaste

A county in south-east Ontario, Canada. County seat: Belleville.

A village and civil parish in Rugby borough, Warwickshire, England (OS grid ref SP4467).

Being too hasty leads to wasteful mistakes.

(idiomatic) To do things in a deliberate manner to reduce mistakes.

(statistics) A Markov chain Monte Carlo method for obtaining a sequence of random samples from a probability distribution from which direct sampling is difficult.

When one is in a hurry, one often ends up having less success and completes a task more slowly.

Getting married too soon will lead to a bad marriage. / Joining (or merging) two things together too soon will lead to problems.

Doing things too quickly results in mistakes.