dar siete vueltas a la lengua antes de hablar

listen to the pronunciation of dar siete vueltas a la lengua antes de hablar
Spanish - English
mind one's p's and q's
To be very careful to behave correctly

When we go to visit, do remember to mind your p's and q's, children — we don't want another incident like last time.

(deyim) Mind one's manners, or, generally, to be careful of one's behaviour. It is sometimes written mind one's P's and Q's (though some feel that apostrophes are unnecessary in the plurals of capital letters), or mind one's p's and q's
mind one's own affairs, pay more attention to one's own business