The Prophet (ﷺ) said, "He who lets the people hear of his good deeds intentionally, to win their praise, Allah will let the people know his real intention (on the Day of Resurrection), and he who does good things in public to show off and win the praise of the people, Allah will disclose his real intention (and humiliate him).
Sahih al-Bukhari Book 81, Hadith 88
← Previous Hadith I heard Allah's Messenger (ﷺ) saying, "People are just like camels, out of one hundred, one can hardly find a single camel suitable to ride."

Sahih al-Bukhari Book 81, Hadith 87 Next Hadith → While I was riding behind the Prophet (ﷺ) as a companion rider and there was nothing between me and him except the back of the saddle, he said, "O Mu`adh!" I replied, "Labbaik O Allah's Messenger (ﷺ)! And Sa`daik!" He proceeded for a while and then said, "O Mu`adh!" I said, "Labbaik and Sa`daik, O Allah's Messenger (ﷺ)!" He then proceeded for another while and said, "O Mu`adh bin Jabal!" I replied, "Labbaik, O Allah's Messenger (ﷺ), and Sa`daik!" He said, "Do you know what is Allah's right on His slaves?" I replied, "Allah and His Apostle know better." He said, "Allah's right on his slaves is that they should worship Him and not worship anything besides Him." He then proceeded for a while, and again said, "O Mu`adh bin Jabal!" I replied. "Labbaik, O Allah's Messenger (ﷺ), and Sa`daik." He said, "Do you know what is (Allah's) slaves' (people's) right on Allah if they did that?" I replied, "Allah and His Apostle know better." He said, "The right of (Allah's) slaves on Allah is that He should not punish them (if they did that).

Sahih al-Bukhari Book 81, Hadith 89