"Thoroughgoing sanitary regulations were enforced. These were enjoined on the people, not only as necessary to health, but as the condition of retaining among them the presence of the Holy One. By divine authority Moses declared to them, “The Lord thy God walketh in the midst of thy camp, to deliver thee; ... therefore shall thy camp be holy.” Deuteronomy 23:14 . Ed 38.1"
"For the Lord thy God walketh in the midst of thy camp, to deliver thee, and to give up thine enemies before thee; therefore shall thy camp be holy: that he see no unclean thing in thee, and turn away from thee."
Ellen White directly references Deuteronomy 23:14 in this passage.
"Notwithstanding the hardships of their wilderness life, there was not a feeble one in all their tribes. Ed 38.2"
"He brought them forth also with silver and gold: and there was not one feeble person among their tribes."
The EGW passage directly echoes the sentiment and wording of Psalm 105:37 regarding the health of the Israelites after the Exodus.
"In all their journeyings the ark containing the law of God was to lead the way. The place of their encampment was indicated by the descent of the pillar of cloud. As long as the cloud rested over the tabernacle, they remained in camp. When it lifted, they pursued their journey. Both the halt and the departure were marked by a solemn invocation. “It came to pass, when the ark set forward, that Moses said, Rise up, Lord, and let Thine enemies be scattered.... And when it rested, he said, Return, O Lord, unto the many thousands of Israel.” Numbers 10:35, 36 . Ed 38.3"
"And 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. So it was alway: the cloud covered it by day, and the appearance of fire by night. And 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. At 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. And when the cloud tarried long upon the tabernacle many days, then the children of Israel kept the charge of the Lord, and journeyed not. And 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. And 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. Or 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. At 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 EGW passage directly references and quotes Numbers 10:35-36 and summarizes the events described in Numbers 9:15-23.