expression
don't rush when in doubt; look before you leap
Proverb advising against hasty action when uncertain; often contrasted with 善は急げ (strike while the iron is hot).
See also: 善は急げ
「悪は延べよ」というから、もう少し情報を集めてから決めよう。
As the saying goes, 'Don't rush when in doubt,' so let's gather more information before deciding.