Numbers 2:9
2:9 All those numbered of the camp of Judah, according to their divisions, are 186,400. They will travel at the front.
Numbers 8:2-3
8:2 “Speak to Aaron and tell him, ‘When you set up the lamps, the seven lamps are to give light in front of the lampstand.’”
8:3 And Aaron did so; he set up the lamps to face toward the front of the lampstand, as the Lord commanded Moses.