Al-Hasan supported this judgement. (Allah says:)
"And mention in the Book (the Qur'an) Isma'il (Ishmael): Verily! He was true to what he promised." (V.19:54)
Ibn Al-Ashwa' judged that promises should be fulfilled, and he mentioned that Samura adopted the same opinion.
Narrated Al-Miswar bin Makhzama رضي الله عنه: I heard the Prophet ﷺ saying: (about one of his sons-in-law), "He promised me and fulfilled his promise." Narrated Abu 'Abdullah (Al-Bukhari): I saw Ishaq bin Ibrahim depending on Ibn Ashwa's narration in giving verdicts.
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ جَعْفَرٍ، عَنْ أَبِي سُهَيْلٍ، نَافِعِ بْنِ مَالِكِ بْنِ أَبِي عَامِرٍ عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ .
Allah's Messenger (ﷺ) said, "The signs of a hypocrite are three:
(1) whenever he speaks, he tells a lie,
(2) whenever he is entrusted, he proves to be dishonest,
(3) whenever he promises, he breaks his promise.