وَعَن عبدِ اللَّهِ بنِ أُنَيْسٍ
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِنَّ مِنْ أَكْبَرِ الْكَبَائِرِ الشِّرْكَ بِاللَّهِ وَعُقُوقَ الْوَالِدَيْنِ وَالْيَمِينَ الْغَمُوسَ وَمَا حَلَفَ حَالِفٌ بِاللَّهِ يَمِينَ صَبْرٍ فَأَدْخَلَ فِيهَا مِثْلَ جَنَاحِ بَعُوضَةٍ إِلَّا جُعِلَتْ نُكْتَةً فِي قَلْبِهِ إِلَى يَوْمِ الْقِيَامَةِ»
Abdallah ibn Unais reported God’s Messenger as saying, “Among the most serious of major sins are attributing a partner to God, unfilial behaviour, and deliberate perjury. If anyone swears an oath which he is compelled to take (or a firm oath) and introduces into it as much falsehood as a gnat’s wing, a spot will be put in his heart till the day of resurrection.”
Mishkat al-Masabih 3618, Book 19, The Offices of Commander and Qadi, Hadith 113. 1 min read