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abudawud:1947 – Musaddad > Ismāʿīl > Ayyūb > Muḥammad > Ibn Abū Bakrah > Abū Bakrah

The Prophet ﷺ gave a sermon during his hajj and said: Time has completed a cycle and assumed the form of the day when Allah created the heavens and the earth. The year contains twelve months of which four are sacred, three of them consecutive, viz. Dhul-Qa'dah, Dhul-Hijjah and Muharram and also Rajab of Mudar which comes between Jumadah and Sha'ban.  

أبو داود:١٩٤٧ – حَدَّثَنَا مُسَدَّدٌ حَدَّثَنَا إِسْمَاعِيلُ حَدَّثَنَا أَيُّوبُ عَنْ مُحَمَّدٍ عَنِ ابْنِ أَبِي بَكْرَةَ عَنْ أَبِي بَكْرَةَ

أَنَّ النَّبِيَّ ﷺ خَطَبَ فِي حَجَّتِهِ فَقَالَ إِنَّ الزَّمَانَ قَدِ اسْتَدَارَ كَهَيْئَتِهِ يَوْمَ خَلَقَ اللَّهُ السَّمَوَاتِ وَالأَرْضَ السَّنَةُ اثْنَا عَشَرَ شَهْرًا مِنْهَا أَرْبَعَةٌ حُرُمٌ ثَلاَثٌ مُتَوَالِيَاتٌ ذُو الْقَعْدَةِ وَ ذُو الْحِجَّةِ وَالْمُحَرَّمُ وَرَجَبُ مُضَرَ الَّذِي بَيْنَ جُمَادَى وَشَعْبَانَ  

See similar narrations below:

Collected by Bukhārī, Nasāʾī's Kubrá
bukhari:3197 – Muḥammad b. al-Muthanná > ʿAbd al-Wahhāb > Ayyūb > Muḥammad b. Sīrīn > Ibn Abū Bakrah > Abū Bakrah

The Prophet ﷺ said. "(The division of time has turned to its original form which was current when Allah created the Heavens and the Earths. The year is of twelve months, out of which four months are sacred: Three are in succession Dhul-Qa' da, Dhul-Hijja and Muharram, and (the fourth is) Rajab of (the tribe of) Mudar which comes between Jumadi-ath-Thaniyah and Sha ban."  

البخاري:٣١٩٧ – حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى حَدَّثَنَا عَبْدُ الْوَهَّابِ حَدَّثَنَا أَيُّوبُ عَنْ مُحَمَّدِ بْنِ سِيرِينَ عَنِ ابْنِ أَبِي بَكْرَةَ عَنْ أَبِي بَكْرَةَ ؓ

عَنِ النَّبِيِّ ﷺ قَالَ الزَّمَانُ قَدِ اسْتَدَارَ كَهَيْئَتِهِ يَوْمَ خَلَقَ السَّمَوَاتِ وَالأَرْضَ السَّنَةُ اثْنَا عَشَرَ شَهْرًا مِنْهَا أَرْبَعَةٌ حُرُمٌ ثَلاَثَةٌ مُتَوَالِيَاتٌ ذُو الْقَعْدَةِ وَذُو الْحِجَّةِ وَالْمُحَرَّمُ وَرَجَبُ مُضَرَ الَّذِي بَيْنَ جُمَادَى وَشَعْبَانَ  

bukhari:4662 – ʿAbdullāh b. ʿAbd al-Wahhāb > Ḥammād b. Zayd > Ayyūb > Muḥammad > Ibn Abū Bakrah > Abū Bakrah

The Prophet ﷺ said, "Time has come back to its original state which it had when Allah created the Heavens and the Earth; the year is twelve months, four of which are sacred. Three of them are in succession; Dhul-Qa'da, Dhul-Hijja and Al-Muharram, and (the fourth being) Rajab Mudar (named after the tribe of Mudar as they used to respect this month) which stands between Jumad (ath-thani) and Sha'ban."  

البخاري:٤٦٦٢ – حَدَّثَنَا عَبْدُ اللَّهِ بْنُ عَبْدِ الْوَهَّابِ حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ عَنْ أَيُّوبَ عَنْ مُحَمَّدٍ عَنِ ابْنِ أَبِي بَكْرَةَ عَنْ أَبِي بَكْرَةَ

عَنِ النَّبِيِّ ﷺ قَالَ إِنَّ الزَّمَانَ قَدِ اسْتَدَارَ كَهَيْئَتِهِ يَوْمَ خَلَقَ اللَّهُ السَّمَوَاتِ وَالأَرْضَ السَّنَةُ اثْنَا عَشَرَ شَهْرًا مِنْهَا أَرْبَعَةٌ حُرُمٌ ثَلاَثٌ مُتَوَالِيَاتٌ ذُو الْقَعْدَةِ وَذُو الْحِجَّةِ وَالْمُحَرَّمُ وَرَجَبُ مُضَرَ الَّذِي بَيْنَ جُمَادَى وَشَعْبَانَ  

nasai-kubra:4201 – ʿAmr b. Zurārah > Ismāʿīl > Ayyūb > Muḥammad b. Sīrīn > Abū Bakrah

The Prophet ﷺ gave a sermon during his hajj and said: Time has completed a cycle and assumed the form of the day when Allah created the heavens and the earth. The year contains twelve months of which four are sacred, three of them consecutive, viz. Dhul-Qa'dah, Dhul-Hijjah and Muharram and also Rajab of Mudar which comes between Jumadah and Sha'ban. (Using translation from Abū Dāʾūd 1947)  

الكبرى للنسائي:٤٢٠١ – أَخْبَرَنَا عَمْرُو بْنُ زُرَارَةَ قَالَ أَخْبَرَنَا إِسْمَاعِيلُ قَالَ أَخْبَرَنَا أَيُّوبُ عَنْ مُحَمَّدِ بْنِ سِيرِينَ عَنْ أَبِي بَكْرَةَ

أَنَّ النَّبِيَّ ﷺ خَطَبَ فِي حَجَّتِهِ فَقَالَ «أَلَا إِنَّ الزَّمَانَ قَدِ اسْتَدَارَ كَهَيْئَتِهِ يَوْمَ خَلَقَ اللهُ السَّمَوَاتِ وَالْأَرْضَ السَّنَةُ اثْنَا عَشَرَ شَهْرًا مِنْهَا أَرْبَعَةٌ حُرُمٌ ثَلَاثَةٌ مُتَوَالِيَاتٌ ذُو الْقَعْدَةِ وَذُو الْحِجَّةِ وَالْمُحَرَّمُ وَرَجَبُ الَّذِي بَيْنَ جُمَادَى وَشَعْبَانَ»