Hazrat Ja'far bin Nahar says that I asked Hazrat Qasim whether the dawn (Fajr) appears lengthwise or widthwise? He replied that the dawn appears widthwise; the lengthwise appearance is the false dawn (Subh Kadhib).

Hazrat Abu Majliz says that the long (vertical) light is not (the sign of) morning; rather, the light that rises from the horizon is (the sign of) morning.

Hazrat Muslim says that the predecessors did not consider your (current) dawn as Fajr; rather, they considered that light as Fajr which would illuminate the paths and houses.

Hazrat Adi bin Thabit narrates that we had a disagreement regarding Fajr. We went to Ibrahim, and he said that there are two types of Fajr. One is the bright Fajr, which spreads vertically; this does not make the Fajr prayer permissible nor does it make eating unlawful. The other is the red Fajr, which spreads horizontally; this makes the prayer permissible and eating and drinking unlawful.

Hazrat Aamir and Hazrat Ata say that the dawn spreads horizontally and there is light with it.

Hazrat Ja'far bin Burqan says that I asked Hazrat Zuhri and Hazrat Maymun that I want to fast, and I see the morning light in the form of a pillar? They replied that you may eat and drink until the light appears on the horizon of the sky in a horizontal form.

Hazrat Adi bin Hatim narrates that when this verse of the Holy Qur'an was revealed { حَتَّی یَتَبَیَّنَ لَکُمُ الْخَیْطُ الأَبْیَضُ مِنَ الْخَیْطِ الأَسْوَد }, I said, "O Messenger of Allah! I placed two threads under my pillow, one black thread and one white thread. I try to distinguish between night and day." The Messenger of Allah (peace and blessings be upon him) said, "Your pillow is very wide indeed; in this verse, what is meant is the darkness of the night and the whiteness of the day."

Hazrat Ibn Abbas (may Allah be pleased with them) says that the fasting person has a choice until midday.

Hazrat Ibn Umar (may Allah be pleased with them both) narrates that the fasting person has the option until midday.

Hazrat Anas (may Allah be pleased with him) narrates that whoever intends to fast in his heart has the option until he speaks. This option remains until most of the day has passed.