But Moses said to YHWH, Then the Egyptians will hear of it, for you brought up this people in your might from among them...
Numbers 14:13

God will keep His promises for the sake of His name and in honor of your obedience.

On the other hand, don't put your faith in promises that God has not made. See Numbers 14:42...

"Do not go up, for YHWH is not among you, lest you be struck down before your enemies."