Abu Hurairah (May Allah be pleased with him) reported

The Messenger of Allah (ﷺ) was asked, "Which deed is the best?" He (ﷺ) replied, "Faith in Allah and His Messenger." He (ﷺ) was asked, "What is next?" He (ﷺ) replied, "Jihad (holy fighting) in the Cause of Allah." Then he was asked: "What is after that (in goodness)?" He (ﷺ) replied, "Hajj Mabrur (which is accepted by Allah)."

[Al-Bukhari and Muslim].