דברי הימים א, פרק כ״ג, פסוק י״ז

The lineage of Eliezer, descending from the family of Moses, presents a striking contrast across generations. While the patriarch of this family had only a single son, named Rehavia, his descendants thrived and grew immensely. Although records indicate that Eliezer had no children other than Rehavia, elsewhere in the historical accounts a man named Isaiah is mentioned as Eliezer's son. This is resolved by understanding that Isaiah was actually Rehavia's son, and he is considered the son of Eliezer simply because he was his grandson [מלבי״ם].

The primary approach among commentators is that the rapid expansion of this family was a matter of sheer numbers. Rehavia's descendants multiplied at a remarkable pace, growing far beyond normal and expected birth rates [מצודת דוד, רלב״ג, ביאור שטיינזלץ]. At the same time, this growth was not merely physical. The expansion also reflected a rise in greatness, social elevation, and status. The members of this family achieved such a distinguished level of prestige that their descendants were eventually appointed to oversee the vast, holy treasures of the Temple. This was a sensitive role requiring immense trust, a duty reserved exclusively for individuals of the greatest stature [מלבי״ם].