Jami` at-Tirmidhi 3265
جامع الترمذي#3265SahihNarrated At-Tufail bin Ubayy bin Ka'b:from his father, from the Prophet (ﷺ) (regarding this Ayah): 'And made them stick to the word of Taqwa (48:26).' He (ﷺ) said (the word is): "La Ilaha Illallah
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan
Zubair Ali ZaiHasan
In-book reference: 47:317