“Sign in haste, repent at leisure”

Entry in progress—B.P.
“Marry in haste and repent at leisure” is a proverb that has been cited in print since at least 1568.
 
Wiktionary: Marry in haste, repent at leisure
Proverb
marry in haste, repent at leisure

1. Getting married too soon will lead to a bad marriage.
2. Joining (or merging) two things together too soon will lead to problems.
 
Landlord-Law Blog
Tenants legal help – do you get a cooling off period?
Written on January 24, 2011 by Tessa Shepperson
Sign in haste repent at leisure, is something that prospective tenants ought to bear in mind when signing tenancy agreements. You need to be really sure you want that property.
 
Waring & Co. (employment law solicitors)
Compromise Agreements…Sign in haste, repent at leisure
Posted on January 13, 2013 by David Winston
The importance of adhering to the terms of a Compromise Agreement was highlighted in the recent case of Imam-Sadeque v Bluebay Asset Management, in which the High Court found that the employer, by virtue of the employee being in breach of the terms of his Compromise Agreement, was entitled to a repayment of monies paid as part of a termination package pursuant to a claw-back clause in the Compromise Agreement.
 
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The Cantankerous Curmudgeon · 55 like this
January 17, 2012 at 7:46pm ·
Sign in haste, repent at leisure…now truly only the bad guys have bad guns in NY!
NEW YORK (WABC)—It appears someone forgot to exempt police officers from the ban of ammunition clips with more than 7 bullets in New York State’s new gun control law.
It’s a big oversight that apparently happened in the haste by the Cuomo Administration to get a tough package of gun-control measures signed into law.