Numbers 12:14 - Joseph Benson’s Commentary on the Old and New Testaments

If her father had but spit in her face That is, had expressed some eminent token of indignation and contempt, in consequence of her having provoked him to anger by some undutiful behaviour. See Job 30:10; Isaiah 50:6. Should she not be ashamed seven days And withdraw herself from her father's presence, as Jonathan did on a like occlusion? 1 Samuel 20:34. And how much more ought she to be ashamed when she lies under this severe mark of the divine displeasure! So, though God had healed her according to Moses's request yet he would have her publicly bear the shame of her sin, and be a warning to others to keep them from the same transgression.