In The Name of Allaah, The Most Merciful The Bestower of Mercy
Allaah (subhaanah) said:
”O people of the Scripture (Jews and Christians): Why do you mix truth with falsehood and conceal the truth while you know” (3:71)
Imaam Ibnul Qayyim (rahimahullaah) said about the hypocrites:
And from the characteristics of the hypocrites is that they conceal the truth. (They are) deceptive towards its people and they charge them with their diseases. They accuse them when they enjoin good, forbid evil and call to Allaah and His Messenger. That is because they (hypocrites) are a people of trials and tribulation and mischief makers upon the earth. Allaah has made known to His Messenger and the believers that they (hypocrites) are mischief makers upon the earth.
And when the inheritors of the Messenger (sallal-laahu-alayhi-wasallam) call them to the Book of Allaah and the Sunnah of His Messenger, particularly to that which is unadulterated, they charge them with bidah and misguidance. When they see them being ones who abstain from the dunyah, having fervent desire for the hereafter and traversing the path of obedience to Allaah and His Messenger, they charge them with falsehood, deception and insidiousness. When they see them with the truth, they mix it with falsehood and give that out to those of weak intellect, turning it into something repugnant in order to make them flee from it. And when they (hypocrites) have falsehood with them, they disguise it with the garment of truth and give it out, turning it into something that would be accepted from them.
Source: Tareeqatul Hijratain (602-603)