Page 543
ʾinnamā n-najwā mina sh-shayṭāni li-yaḥzuna lladhīna ʾāmanū wa-laysa bi-ḍārrihim shayʾan ʾillā bi-ʾidhni llāhi wa-ʿalā llāhi fa-l-yatawakkali l-muʾminūna
Indeed [malicious] secret talks are from Satan, that he may upset the faithful, but he cannot harm them in any way except by Allah’s leave, and in Allah let all the faithful put their trust.
— Ali Quli Qarai
Surah Mujadila - Verse 10
10. Secret counsels are only from Satan in order that he may cause grief to the believers. But he cannot harm them in the least, except as Allah permits. Therefore, let the believers put their trust in Allah.
Any explicit or implicit talk leading to causing fear and anxiety among Muslims is satanic. Thus, the blessed Verse as the last one treating of the question reflects that such talk only stems from satanic temptations aiming at Muslims' concerns and grieves. However, Muslims should know that without Divine Permission, Satan may not harm believers, since no cause in the world of existence is dependent on Divine Command.
Even fire and sword may neither burn nor sever without God's Command. When God Almighty forbids something, even His friend may not do anything. Thus, it is incumbent upon believers to put their trust solely in God Almighty and set their hearts on no one but Him nor are they supposed to fear one but Him. Relying on their trust in God Almighty, they may easily remove such problems and neutralize the designs and stratagems of Satan's followers.