Zephaniah's words here highlight a significant spiritual problem of his time: the mixing of worship between the God of Israel and other deities, such as Molek. This syncretism was a common issue, as people sought to cover all bases by worshiping multiple gods, hoping to secure blessings and protection from various sources. However, this practice was contrary to the exclusive devotion that God required. The verse underscores the importance of wholehearted commitment to God, emphasizing that true worship cannot be divided or shared with other deities or idols.
The mention of worship on rooftops refers to a common practice of the time, where people would offer prayers and sacrifices to celestial bodies, believing them to be divine. Zephaniah's message is a call to reject such practices and to return to a pure, undivided faith in God. This verse challenges believers to examine their own lives for any divided loyalties or compromises in their faith. It encourages a sincere and exclusive devotion to God, reminding us that true worship involves a complete and undivided heart.