שמות, פרק ד׳, פסוק ח׳

Building trust with an enslaved and broken nation requires a gradual approach. God equips Moses with a series of miracles carefully tailored to the mental state and varying levels of faith among the Israelites. When God raises the possibility that the people might not believe the initial miracle, it does not imply any divine uncertainty, as God knows the future perfectly. Rather, He is directly addressing Moses’ personal anxieties. The reassurance is that if certain individuals remain unconvinced by the first wonder, the subsequent one will persuade them [אבן עזרא, טור הארוך, ביאור יש״ר].

Miracles communicate a profound message, which is why they are described conceptually as having a "voice." Since a physical wonder does not produce an audible sound, the Torah speaks in human terms to represent the divine message, hint, and decree hidden within the event [הכתב והקבלה, העמק דבר]. Listening to this voice is a metaphor for paying close attention and investigating the phenomenon deeply [שד״ל]. Furthermore, this phrasing directly mirrors Moses’ initial complaint that the Israelites would not listen to his own voice [קאסוטו].

Even though the transformation of a staff into a snake is an extraordinary wonder, a second proof is necessary. Crushed by harsh labor and impatience, the Israelites might lack the mental clarity to properly observe and absorb the first miracle, requiring another event to force them to look deeper [שד״ל]. Additionally, a progression of miracles addresses the diverse nature of the people, ranging from the righteous who believe instantly to the stubborn who demand further evidence [בכור שור]. The sudden healing of severe leprosy is also naturally more impressive, as it demonstrates absolute divine control by restoring an organ that was effectively dead [ספורנו, חזקוני].

Beyond its physical impossibility, the leprosy carries a profound moral and educational weight. By displaying his afflicted hand, Moses reveals that he was punished for speaking ill of the Israelites when he doubted their faith. Witnessing Moses willingly expose his own disgrace and suffering for their sake, and recognizing that God actively punishes those who speak against Israel—just as He did with Pharaoh and Abimelech in the past—fosters deep trust [רש״י, יריעות שלמה, ברטנורא]. While the first miracle symbolizes the removal of an external threat, the second addresses the internal root of their suffering. It targets the slander and division among the people that caused their exile to begin with [כלי יקר].

Although the leprosy is designated as the "latter" sign, a third miracle involving water turning to blood immediately follows. In Biblical language, "latter" does not necessarily mean the absolute end; it can simply mean the second or the next in sequence [שד״ל, תורה תמימה, העמק דבר]. Furthermore, at that specific moment in the wilderness, God had only shown Moses two signs [אבן עזרא, מלבי״ם], making it the final private demonstration before Moses traveled to Egypt to perform them before the nation [רבנו בחיי]. Yet, the third sign remains essential. Because the first two wonders were personal to Moses and posed no direct threat to Egypt, the Israelites might still doubt his ability to defeat their oppressors. The transformation of water to blood represents death and a direct strike prepared for the Egyptians, ultimately sealing the Israelites' faith [לבוש האורה, משכיל לדוד].