The Hebrew noun mas refers to the system of forced labor or tribute imposed on subjugated peoples. Under Solomon's reign, mas labor built the Temple and royal projects. It became a symbol of political oppression that the northern tribes eventually rejected.
Mas carries the heavy weight of exploitation and its consequences. Solomon's conscription of forced labor (mas) — even from among Israelites (1 Kings 5:13-14) — violated the covenant ideals of freedom that the Exodus had established. The prophet's vision of a coming king who 'will take your sons and make them serve with his chariots' (1 Samuel 8:11) was fulfilled under Solomon. When Rehoboam refused to lighten the mas burden, the kingdom split (1 Kings 12). Mas is a warning about how even God's gifts (wisdom, wealth, a king) can become instruments of oppression when divorced from covenant love.