Evidence that the fear prayer is established and was not abrogated

Abdur Rahman bin Abi Sa'id narrates from his father (may Allah be pleased with him): We were with the Messenger of Allah (peace and blessings be upon him) at the Trench (Khandaq). We were kept occupied from the prayers, so the Messenger of Allah (peace and blessings be upon him) ordered Bilal (may Allah be pleased with him) to call the iqamah for each prayer. This was before this verse was revealed: "And if you fear (the enemy), then (pray) on foot or riding." [Surah al-Baqarah: 239]

Sulaym bin Ubayd al-Saluli (may Allah have mercy on him) said: I was with Sayyiduna Sa'id bin al-As (may Allah be pleased with him) in Tabaristan, and with him was a group of the Companions of the Prophet (peace and blessings be upon him). Sayyiduna Sa'id (may Allah be pleased with him) asked them: "Which of you was present with the Prophet (peace and blessings be upon him) at the fear prayer (salat al-khawf)?" Sayyiduna Hudhayfah (may Allah be pleased with him) said: "I (was present). Order your companions to divide into groups: one group facing the enemy and another group behind you. You say the takbir and they all say the takbir; you bow and they all bow; and when you raise your head from bowing, they all raise their heads from bowing. Then you prostrate, and the group that is with you prostrates as well while the other group remains standing facing the enemy. When you raise your head, those who are next to you stand up and the other group prostrates. Then you bow and they all bow. Then you raise your head and they all raise their heads. When you prostrate, the group next to you prostrates while the other group remains standing facing the enemy. When you raise your head from prostration, those who were standing facing the enemy prostrate. Then you give the salam, and order your companions that if fighting flares up, then fighting and speaking become permissible for them."

Abdus Samad bin Habib narrates from his father (may Allah have mercy on him) that they went on a campaign to Kabul together with Sayyiduna Abdur Rahman bin Samurah (may Allah be pleased with him), and he led us in the fear prayer.

(a) Abu al-Aliyah said: Abu Musa al-Ash'ari (may Allah be pleased with him) led us in the fear prayer at a place called Isfahan.
(b) Ja'far bin Muhammad narrates from his father that Ali (may Allah be pleased with him) led the fear prayer on the Night of al-Harir.
(c) Ibn Umar (may Allah be pleased with them both) was asked about the fear prayer, and he described its method.