Tafsir Ibn Kathir -> Surah Al-Fatiha -> Tawhid Al-Uluhiyyah

Ad-Dahhak narrated that Ibn `Abbas said,

﴿إِيَّاكَ نَعْبُدُ﴾

(You we worship) means, "It is You whom we single out, Whom we fear and Whom we hope in, You alone, our Lord, and none else.