haste makes waste(being too hasty leads to wasteful mistakes) phrase [UK: heɪst ˈmeɪks weɪst] [US: ˈheɪst ˈmeɪks ˈweɪst]
more haste, less speed(when one is in a hurry, one often ends up completing a task more slowly) phrase [UK: mɔː(r) heɪst les spiːd] [US: ˈmɔːr ˈheɪst ˈles ˈspiːd]