New Revised Standard Version
Why will you discourage the hearts of the Israelites from going over into the land that the LORD has given them?

Contemporary English Version
If you did that, it would discourage the others from crossing over into the land the LORD promised them.

New American Bible
Why do you wish to discourage the Israelites from crossing to the land the LORD has given them?

Douay-Rheims Bible
Why do ye overturn the minds of the children of Israel, that they may not dare to pass into the place which the Lord hath given them?

Why do ye overturn the minds of the children of Israel, that they may not dare to pass into the place which the Lord hath given them?

wherefore

Numbers 32:9 And when they were come as far as the valley of the cluster, having viewed all the country, they overturned the hearts of the children of Israel, that they should not enter into the coasts, which the Lord gave them.

Numbers 21:4 And they marched from mount Hor, by the way that leadeth to the Red Sea, to compass the land of Edom. And the people began to be weary of their journey and labour:

Deuteronomy 1:28 Whither shall we go up? the messengers have terrified our hearts, saying: The multitude is very great, and taller than we: the cities are great, and walled up to the sky, we have seen the sons of the Enacims there.

discourage.

Acts 21:13 Then Paul answered and said: What do you mean, weeping and afflicting my heart? For I am ready not only to be bound, but to die also in Jerusalem, for the name of the Lord Jesus.