that the Messenger of Allah (ﷺ) said: 'Indeed, Paradise longs for three: 'Ali, 'Ammar, and Salman."
Jami` at-Tirmidhi Book 49, Hadith 196
← Previous Hadith that Al-'Aqib and As-Sayyid (two of the leaders of the Christians of Najran) came to the Prophet (ﷺ) and said: "Send with us your trustworthy one." He said: "I shall send with you a trustworthy one who is truly a trustworthy one." So the people desired that, and he sent Abu 'Ubaidah, may Allah be pleased with him.

Jami` at-Tirmidhi Book 49, Hadith 195 Next Hadith → that 'Ammar bin Yasir came seeking permission to enter upon the Prophet (ﷺ) so he said: 'Permit him, greetings to the pure one, the purified."

Jami` at-Tirmidhi Book 49, Hadith 197