A deeply rooted misunderstanding about divine justice had taken hold among the people, expressing itself as a popular proverb. To put an end to this false belief, God takes a severe oath. He makes a firm negative vow [ביאור שטיינזלץ] that the telling of this proverb [רש״י] will be completely eliminated. From this point forward, the saying will vanish entirely from both the daily speech and the inner thoughts of the Israelites [ביאור שטיינזלץ].
The proverb will disappear because God intends to clearly reveal the true nature of His judgment. Once the people are informed of how His justice actually operates, they will recognize that He is perfectly fair and they will abandon their previous error [מצודת דוד, רד״ק].
The foundation of this justice is that every single soul belongs to God. The soul of a father and the soul of a son are equally His. He brings these souls down into the physical world, placing them in bodies of flesh and blood, with the specific purpose that they follow His ways. God truly desires for them to live and not to die. Because all souls are drawn directly from His glory and belong to Him in exactly the same measure, it is completely inconceivable that God would ever punish an innocent soul for a sin it did not commit [רד״ק].