Salim bin Amir narrates that Sayyiduna Muawiyah (may Allah be pleased with him) was traveling in the land of Rome, while there was a treaty between them and him. Sayyiduna Amir Muawiyah (may Allah be pleased with him) intended to get closer to them so that when the term of the treaty ended, he could attack them. But an elder, who was riding an animal, said: Allahu Akbar, Allahu Akbar, fulfill the covenant, do not break the covenant. The Messenger of Allah (peace and blessings be upon him) said: If a man has made a covenant with a people, he should neither break it nor strengthen it (for war preparations), until the term is over or (due to fear of their deception) he informs them of breaking the treaty (so that the other party is also equal in breaking the covenant). When Sayyiduna Muawiyah (may Allah be pleased with him) learned of this, he turned back. This elder was Sayyiduna Amr bin Abasah (may Allah be pleased with him).