To all the congregation That is, to the rulers of the congregation. They (Moses and Aaron, and the other rulers) put him in ward Till the will of the Lord concerning him should be declared. What should be done That is, in what manner, or by what kind of death he was to die, which, therefore, God here particularly determines: otherwise it was known in general that sabbath-breakers were to be put to death.
Related Commentaries of Numbers 15:33
Numbers 15:33-34
33 And they that found him gathering sticks brought him unto Moses and Aaron, and unto all the congregation.
34 And they put him in ward, because it was not declared what should be done to him.