Numbers 10:32

And it shall be, if thou go with us, yea, it shall be, that what goodness the Lord shall do unto us, the same will we do unto thee. By joining the people of the Lord, Hobab and his people would share in all the temporal and spiritual benefits which the Lord had promised to His chosen nation. The words of Moses apparently did not lack in persuasive power at this time, for it seems that Hobab joined the host with his tribe, Judges 1:16. The passage contains a fine hint in regard to missionary methods which might be applied to this day.