It was also a serious test for us to serve alongside KGB agents who infiltrated the congregations without our realizing it.
(‏ مز ١٣٠ :‏ ٣‏ )‏ وَأَحْيَانًا تَسَلَّلَ عُمَلَاءُ مِنَ ٱلْمُخَابَرَاتِ إِلَى ٱلْجَمَاعَاتِ .‏