The Messenger of Allah ﷺ said, "If people were given whatever they claimed, some men would claim the blood and property of others. But the oath is upon the one against whom the claim is made."
حدثنا حرملة بن يحيى المصري حدثنا عبد الله بن وهب أنبأنا ابن جريج عن ابن أبي مليكة
أن رسول الله ﷺ قال لو يعطى الناس بدعواهم ادعى ناس دماء رجال وأموالهم ولكن اليمين على المدعى عليه
Bukhari related it in the Book of Tafsir, chapter "Those who trade away Allah's covenant..." etc., no. 4552, from the hadith of Ibn Jurayj, through him. And Muslim related it in the Book of Judgments, chapter "The oath is required of the defendant," no. 1711, from the hadith of Ibn Wahb, through him.