Jami` at-Tirmidhi 706

جامع الترمذي#706Sahih

Samurah bin Jundub narrated that :the Messenger of Allah said: "Do not let the Adhan of Bilal prevent you from your Sahar, nor the drawn out Fajr, but the Fajr that spreads on the horizon

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

Zubair Ali ZaiSahih Muslim

In-book reference: 8:25

All of Jami` at-Tirmidhi