[Machine] Umar used to swear, and then the Prophet ﷺ forbade him from doing so. He said, "Whoever swears by something other than Allah, he has committed shirk (associating partners with Allah)." The other person said, "So swearing is considered shirk."
كَانَ عُمَرُ يَحْلِفُ وَأَبِي فَنَهَاهُ النَّبِيُّ ﷺ قَالَ مَنْ حَلَفَ بِشَيْءٍ دُونَ اللهِ تَعَالَى فَقَدْ أَشْرَكَ وَقَالَ الْآخَرُ فَهُوَ شِرْكٌ
[Machine] Omar used to swear by his father, so the Prophet ﷺ forbade him from doing so, and he said, "Whoever swears by anything other than Allah has committed shirk (associating partners with Allah)." The other person said, "So it is a form of shirk."
كَانَ عُمَرُ يَحْلِفُ وَأَبِي فَنَهَاهُ النَّبِيُّ ﷺ فَقَالَ «مَنْ حَلَفَ بِشَيْءٍ مِنْ دُونِ اللَّهِ فَقَدْ أَشْرَكَ» وَقَالَ الْآخَرُ «فَهُوَ شِرْكٌ»
"عَنِ ابْنِ عُمَرَ قَالَ: كانَ عُمَرُ يَحْلِفُ: وَأَبِى، فَنَهَاهُ رَسُولُ الله ﷺ وَقَالَ: مَن حلَفَ بِشَىْءٍ مِنْ دُونِ الله فَقَدْ أَشْرَكَ، أَوْ قَالَ: ألا هُوَ شِرْكٌ".