Rancour and malice are of the signs of hypocritical individuals and during the time of the Holy Prophet (peace be upon him and his holy progeny), they used to manifest these in various forms.
Once the Holy Prophet (peace be upon him and his holy progeny) was seated in the mosque in the company of a group of Muhaajir (The Emigrants) and Ansaar (The Helpers), when suddenly Ali (peace be upon him) entered. Those present rose up in respect and warmly welcomed him till he (peace be upon him) sat in his usual place – near the Holy Prophet (peace be upon him and his holy progeny).
Meanwhile, two individuals in the gathering who were being suspected of hypocrisy, began to whisper to each other.
Observing them, the Holy Prophet (peace be upon him and his holy progeny) realized why they were speaking amongst themselves. This enraged him so much that the signs of infuriation became manifest upon his face. He then said: By The One in Whose power lies my soul! None shall enter Paradise except he who loves me. And do know that one who imagines that he loves me but regards this person as an enemy (Ali Ibn Abi Talib), is a liar.
At this moment Ali’s hand was in the hand of the Holy Prophet (peace be upon him and his holy progeny) and the following verse was revealed7: O you who believe! when you confer together in private, do not give to each other counsel of sin and revolt and disobedience to the Messenger, and give to each other counsel of goodness and guarding (against evil); and be careful of (your duty to) Allah, to Whom you shall be gathered together.( Hikaayat-ha-e-Shanidani, vol. 4, pg. 159; Bihaar al-Anwaar, vol. 39, pg. 270. )