Numbers 14:5 (BSB)

Then Moses and Aaron fell facedown before the whole assembly of the congregation of Israel.

From Numbers 14. Also in the ESV.

Commentary on Numbers 14:5

• John Calvin (Reformed), Calvin's Commentaries on Numbers 14:5: 5. Then Moses and Aaron fell on their faces. It is doubtful whether they so humbled themselves towards the people, as to he prostrate before them, or whether it was in prayer that they fell with their faces on the earth; the latter, however, seems more likely to me, as if, by thus turning themselves to God, they reproved the stupidity of the people,.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Numbers 14:5-10: The friends of Israel here interpose to save them if possible from ruining themselves, but in vain. The physicians of their state would have healed them, but they would not be healed; their watchmen gave them warning, but they would not take warning, and so their blood is upon their own heads. I.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Numbers 14:5: Then Moses and Aaron fell on their faces,.... Through shame and confusion of face for them, at hearing so shocking a proposal made, and such wretched ingratitude expressed; they blushed at it, and were in the utmost distress on account of it, and therefore threw themselves into this posture; or it may be this was done either to beg of them that they would lay...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Numbers 14:5: Moses and Aaron fell on their faces--as humble and earnest suppliants--either to the people, entreating them to desist from so perverse a design; or rather, to God, as the usual and only refuge from the violence of that tumultuous and stiff-necked rabble--a hopeful means of softening and impressing their hearts.