Another matter, “God did not lead them [naḥam].” This is analogous to a king who had a son and he sought to bequeath him an inheritance, and he said: ‘If I give it to him now, he is still young and unable to retain it; rather, [I will wait] until my son learns the laws and appreciates their significance, and then I will give it to him.’ So too, the Holy One blessed be He said: ‘If I take Israel into the Land now, they have not yet engaged in the mitzvot, and they do not know the matters of terumot and tithes, Rather, I will give them the Torah and then I will take them into the Land.’
Written and Oral Law of Land
Shemot Rabbah 20:15