ישעיהו, פרק נ״ו, פסוק ד׳

Individuals who cannot have children often face a profound sense of loss regarding their legacy. God speaks directly about the eunuchs, offering them a comforting promise. He grants them a path to achieve a personal, eternal existence of supreme value, providing spiritual compensation for their inability to produce offspring [מלבי״ם]. God addresses them at this specific moment because they were the last group mentioned in the preceding thoughts [רד״ק]. Speaking in the first person, God personally outlines three spiritual conditions for them to fulfill to secure this eternal legacy [שד״ל].

The first condition requires observing the Sabbath. This practice is mentioned first because it serves as a unique sign between God and those who faithfully follow Him [אבן עזרא]. More than just a day of rest, keeping the Sabbath is the very foundation of faith. Through this observance, a person actively testifies to God's creation of the world and His ongoing providence over it [מלבי״ם]. Furthermore, the plural reference to Sabbaths indicates that this requirement extends beyond the weekly day of rest to include the Sabbath of the land, known as the Sabbatical year [רד״ק].

The second condition involves willingly choosing what God desires. This highlights the importance of free will in spiritual life. A person must actively and freely choose to fulfill the Commandments, serve God, and perform deeds that are pleasing to Him [מלבי״ם, מצודת דוד].

The final condition asks individuals to hold fast to God's covenant, gripping it with profound strength and dedication [רש״י, מצודת דוד]. Commentators offer varying perspectives on the exact nature of this covenant. Some explain that it refers to the study of the Torah, which forms the basis of the covenant made with the people of Israel [מלבי״ם, מצודת דוד]. Another approach suggests that holding fast to the covenant represents a broad commitment to the enduring validity of all the Commandments given at Mount Sinai. Alternatively, this covenant may point specifically to the Commandment of circumcision [רד״ק].