حَدَّثَنَا عَبْدُ الرَّزَّاقِ أَخْبَرَنَا سُفْيَانُ عَنْ أَبِيهِ وَالْأَعْمَشِ وَمَنْصُورٍ عَنْ سَعْدِ بْنِ عُبَيْدَةَ عَنِ ابْنِ عُمَرَ قَالَ كَانَ عُمَرُ يَحْلِفُ وَأَبِي فَنَهَاهُ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ مَنْ حَلَفَ بِشَيْءٍ دُونَ اللَّهِ تَعَالَى فَقَدْ أَشْرَكَ وَقَالَ الْآخَرُ وَهُوَ شِرْكٌ
مسند امام احمد بن حنبل · Hadith 4904
It was narrated that Ibn 'Umar said: 'Umar used to swear (saying).By my father. The Prophet (PBUH) told him not to do that and said: "Whoever swears by something other than Allah, may He be exalted, has committed shirk" or "that is shirk."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020