Abu Dawud al-Sijistani (may Allah have mercy on him) said: Sayyiduna Abd al-Rahman bin Samurah (may Allah be pleased with him) prayed in this way, except that the group he had led in one rak'ah, when he gave the salam, went to the place of their companions; then these came and prayed one rak'ah by themselves, then returned to the place of those, and those prayed one rak'ah by themselves. Habib related that they went on campaign with Abd al-Rahman bin Samurah to Kabul, and he led them in the fear prayer.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب صلاة الخوف / 6045