﴿هُوَ الأوَّلُ وَالآخِـرُ وَالظَّاهِرُ وَالْبَاطِنُ وَهُوَ بِكُلِّ شَيْءٍ عَلِيمٌ﴾

He is the First and the Last, al-Ẓāhir and al-Bātin, and He knows well all things.

Reference: He is the First and the Last, al-Ẓāhir and al-Bātin, and He knows well all things. Abū Dāwud (#5110, 4/329) and al-Albānī declared it ḥasan in _Ṣaḥīḥ Abī Dāwud_ (3/962). The exact wording is also found in Sūrah al-Ḥadīd: 3.