King James Bible
Say not thou, What is the cause that the former days were better than these? for thou dost not inquire wisely concerning this.

New King James Version
Do not say, “Why were the former days better than these?” For you do not inquire wisely concerning this.

American Standard Version
Say not thou, What is the cause that the former days were better than these? for thou dost not inquire wisely concerning this.

Berean Study Bible
Do not say, “Why were the old days better than these?” For it is unwise of you to ask about this.

Douay-Rheims Bible
Say not: What thinkest thou is the cause that former times were better than they are now? for this manner of question is foolish.

English Revised Version
Say not thou, What is the cause that the former days were better than these? for thou dost not inquire wisely concerning this.

World English Bible
Don't say, "Why were the former days better than these?" For you do not ask wisely about this.

Young's Literal Translation
Say not thou, 'What was it, That the former days were better than these?' For thou hast not asked wisely of this.

Ecclesiastes 7:10 Additional Translations ...