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| English | Russian |
| Breathern of Purity | Братья чистоты (A secret Arab confraternity that produced a philosophical and religious encyclopaedia in the second half of the 10th century AD) |
| Brethren of Purity | Братья непорочности (A secret society formed by certain Isma'ili intellectuals during the 10th century) |
| Epistles of the Brethren of Purity | философско-религиозная энциклопедия мусульманского братства Ихван ас-Сафа |
| purity of the faith | чистота веры (the ~ Alex_Odeychuk) |