Al-Kāfi - Volume 7 > It is not Permissible to take an Oath by anything other than by Allah, most Majestic, most Glorious
Hadith #5

5- عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنْ إِسْمَاعِيلَ بْنِ مَرَّارٍ عَنْ يُونُسَ عَنْ بَعْضِ أَصْحَابِنَا قَالَ سَأَلْتُهُ عَنْ قَوْلِ اللهِ عَزَّ وَجَلَّ فَلا أُقْسِمُ بِمَواقِعِ النُّجُومِ قَالَ أُعَظِّمُ إِثْمَ مَنْ يَحْلِفُ بِهَا قَالَ وَكَانَ أَهْلُ الْجَاهِلِيَّةِ يُعَظِّمُونَ الْحَرَمَ وَلا يُقْسِمُونَ بِهِ يَسْتَحِلُّونَ حُرْمَةَ اللهِ فِيهِ وَلا يَعْرِضُونَ لِمَنْ كَانَ فِيهِ وَلا يُخْرِجُونَ مِنْهُ دَابَّةً فَقَالَ اللهُ تَبَارَكَ وَتَعَالَى لا أُقْسِمُ بِهذَا الْبَلَدِ وَأَنْتَ حِلٌّ بِهذَا الْبَلَدِ وَوالِدٍ وَما وَلَدَ قَالَ يُعَظِّمُونَ الْبَلَدَ أَنْ يَحْلِفُوا بِهِ وَيَسْتَحِلُّونَ فِيهِ حُرْمَةَ رَسُولِ اللهِ (صَلَّى اللهُ عَلَيْهِ وَآلِه).

5. Ali ibn Ibrahim has narrated from his father from ’Isma‘if ibn Marrar from Yunus from certain persons of our people who has narrated the following: “I once asked him (the Imam), ‘Alayhi al-Salam, about the meaning of the words of Allah, most Majestic, most Glorious, ‘I do not swear by the places of the stars.’ (56:75) He (the Imam) said, ‘It is a great sin on one who swears thereby. The community of ignorance held al-Haram (the sacred area) with greatness. They did not swear thereby. They made lawful to disrespect Allah but they did not disturbed those who were there and did not expel animals from there. Allah, most Blessed, most High, said, ‘I do not swear by this town despite your living in it and by the father and son.’ (90:2-3) He (the Imam) said, ‘They held the town with greatness to the extent that they swore thereby but made it lawful to disrespect the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause.”’