What are hadiths about honoring the pledge (fulfilling the promise)? Examples of hadiths about honoring the pledge (fulfilling the promise)…
Anas b. Malik (ra) said, “When the Messenger of Allah (saw) was giving us sermons he said the following each time: ‘Those who do not guard what is entrusted to them are unfaithful; and those who do not keep their words are irreligious.’” (Ibn Hanbal, III, 134)
According to Abu Bakra (ra), the Prophet (saw) said, “If anyone kills a man who was granted protection in advance, Allah will forbid him to enter Paradise.” (Abu Daʾud, al-Jihad, 153)
According to Ibn ʿAbbas (ra), the Prophet (saw) said, “Do not argue with your brother, do not ridicule him, and do not make a promise only to not fulfill it.” (al-Tirmidhi, al-Birr, 58)
According to Zayd b. Arqam (ra), the Prophet (saw) said, “When a man makes a promise to his brother with the intention of fulfilling it and is not able to do so, and is not able to come at the appointed time, he is guilty of no sin.” (Abu Daʾud, al-Adab, 82)
According to ʿUbada b. Samit (ra), the Prophet (saw) said, “Guarantee for me six actions and I will guarantee for you Paradise: Speak the truth, keep your promise, fulfill the trust when you are entrusted, guard your chastity, keep your eyes off forbidden things, and keep your hands from what is forbidden.” (Ibn Hanbal, V, 323)
Source: Presidency Of Religious Affairs The Turkey, Islam Through Hadiths