Compulsory love for the sahabah
It is reported that Ayyûb Al-Sakhtiyânî – Allâh have mercy on him – said:
“Whoever loves Abu Bakr has upheld the religion,
whoever loves ‘Umar has made the way clear,
whoever loves ‘Uthman is enlightened by the light of Allaah
and whoever loved ‘Ali has taken the firmest handhold.
Whoever speaks well of the companions of the Allaah’s Messenger (sallallahu alyhi wa sallaam) is clear of Hypocricy,
But whoever belittles any of them or dislikes [any of them] for something he did, then he is a heretic (mubtadi’),an opponent of the sunnah and the Righteous Predecessors (the salaf), and it is feared that none of his deeds will be raised to the heavens until he loves all of [the companions] and his heart is clear towards them”
Ibn Abî Zamanîn, Usûl Al-Sunnah article 189.