Deuteronomy 12:13

Take heed to thyself, that thou offer not thy burnt offerings,
&c.] And so any other, this is put for all the rest:

in every place that thou seest;
which might take with their fancy, seem pleasant, and so a proper and suitable place to sacrifice in, as on high places, and under green trees; but they were not to indulge their own fancies and imaginations, or follow the customs of others, but keep to the rules prescribed them by the Lord, and to the place fixed by him for his worship.