English translation
(6). 3020. Abū Umāmah Al-Anṣārī narrated from 'Abdullāh bin Unais Al-Juhnī who said: "The Messenger of Allāh ﷺ said: 'Indeed among the worst of the major sins is Shirk with Allāh, disobeying the parents, the false oath, and no one insists on taking an oath in which he swears, including the like of a wing of a mosquito (of falsehood) in it – except that a spot is placed in his heart until the Day of Judgement.'" (Hasan) [Abū 'Eisā said:] This Hadīth is Hasan Gharīb. Abū Umāmah Al-Anṣārī is Ibn Tha'labah and we do not know his name, and he has reported Aḥādīth from the Prophet ﷺ.
