9:15And on the day that the tabernacle was reared up the cloud covered the tabernacle, namely, the tent of the testimony: and at even there was upon the tabernacle as it were the appearance of fire, until the morning.
9:16So it was alway: the cloud covered it by day, and the appearance of fire by night.
9:17And when the cloud was taken up from the tabernacle, then after that the children of Israel journeyed: and in the place where the cloud abode, there the children of Israel pitched their tents.
9:18At the commandment of the LORD the children of Israel journeyed, and at the commandment of the LORD they pitched: as long as the cloud abode upon the tabernacle they rested in their tents.
9:19And when the cloud tarried long upon the tabernacle many days, then the children of Israel kept the charge of the LORD, and journeyed not.
9:20And so it was, when the cloud was a few days upon the tabernacle; according to the commandment of the LORD they abode in their tents, and according to the commandment of the LORD they journeyed.
9:21And so it was, when the cloud abode from even unto the morning, and that the cloud was taken up in the morning, then they journeyed: whether it was by day or by night that the cloud was taken up, they journeyed.
9:22Or whether it were two days, or a month, or a year, that the cloud tarried upon the tabernacle, remaining thereon, the children of Israel abode in their tents, and journeyed not: but when it was taken up, they journeyed.
9:23At the commandment of the LORD they rested in the tents, and at the commandment of the LORD they journeyed: they kept the charge of the LORD, at the commandment of the LORD by the hand of Moses.
The shortest road has already been refused before the pillar appears. Verse 17 explains that God does not take Israel by the nearer Philistine route because of the danger of returning to Egypt at the sight of war. The guidance described here is therefore not a promise of the fewest miles. It belongs to a deliberate route whose reason the chapter has supplied. The wilderness is not evidence that the guide has mislaid the map.
The two appearances serve named purposes: the cloud leads, and the fire gives light. Day and night do not divide the journey into hours with God and hours without him. Verse 22 repeats the arrangements in a negative form, he took not away, making continuity the point worth saying twice. The passage permits travel by day and night; it does not say nobody ever slept. What remains uninterrupted is the provision of guidance. Israel has left Pharaoh's territory without being left to find its own road.