The Quran states:
وَإِذَا كُنْتَ فِيهِمْ فَأَقَمْتَ لَهُمُ الصَّلَاةَ فَلْتَقُمْ طَائِفَةٌ مِنْهُمْ مَعَكَ
Translation: When you are among them and lead them in prayer, let a group of them stand with you.
Taifah means a group. The duty to pray remains, but its manner is adjusted to the exigency of danger.
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Salat al-Khawf: Congregational Prayer and Worship under Threat
The Quran states:
وَإِذَا كُنْتَ فِيهِمْ فَأَقَمْتَ لَهُمُ الصَّلَاةَ فَلْتَقُمْ طَائِفَةٌ مِنْهُمْ مَعَكَ
Translation: When you are among them and lead them in prayer, let a group of them stand with you.
Taifah means a group. The duty to pray remains, but its manner is adjusted to the exigency of danger.