Various Writings – Selections from the Writings of the Báb – Bahá’í Publishing Trust, Para (6:1), page 197

Say, God is the Lord and all are worshippers unto Him.

Say, God is the True One and all pay homage unto Him.

This is God, your Lord, and unto Him shall ye return.

Is there any doubt concerning God? He hath created you and all things. The Lord of all worlds is He.