صحيح البخاري Sahih Bukhari كتاب تقصير الصلاة The Book of Abridged Or Shortened Prayers (At-Taqsir)
بَابُ هَلْ يُؤَذِّنُ أَوْ يُقِيمُ إِذَا جَمَعَ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ:

(14) Chapter. Should the Adhan or Iqama be pronounced when the Maghrib and Isha prayers are offered together?

2 hadith
Hadith 1109
حَدَّثَنَا أَبُو الْيَمَانِ ، قَالَ : أَخْبَرَنَا شُعَيْبٌ ، عَنِ الزُّهْرِيِّ ، قَالَ : أَخْبَرَنِي سَالِمٌ ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا ، قَالَ : " رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا أَعْجَلَهُ السَّيْرُ فِي السَّفَرِ يُؤَخِّرُ صَلَاةَ الْمَغْرِبِ حَتَّى يَجْمَعَ بَيْنَهَا وَبَيْنَ الْعِشَاءِ " ، قَالَ سَالِمٌ : وَكَانَ عَبْدُ اللَّهِ بْنُ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا يَفْعَلُهُ إِذَا أَعْجَلَهُ السَّيْرُ وَيُقِيمُ الْمَغْرِبَ فَيُصَلِّيهَا ثَلَاثًا ثُمَّ يُسَلِّمُ ، ثُمَّ قَلَّمَا يَلْبَثُ حَتَّى يُقِيمَ الْعِشَاءَ فَيُصَلِّيهَا رَكْعَتَيْنِ ثُمَّ يُسَلِّمُ ، وَلَا يُسَبِّحُ بَيْنَهُمَا بِرَكْعَةٍ وَلَا بَعْدَ الْعِشَاءِ بِسَجْدَةٍ حَتَّى يَقُومَ مِنْ جَوْفِ اللَّيْلِ .
Narrated Az-Zuhri: Salim told me, "`Abdullah bin `Umar said, 'I saw Allah's Apostle delaying the Maghrib prayer till he offered it along with the `Isha prayer whenever he was in a hurry during the journey.' " Salim said, "Abdullah bin `Umar used to do the same whenever he was in a hurry during the journey. After making the call for Iqama, for the Maghrib prayer he used to offer three rak`at and then perform Taslim. After waiting for a short while, he would pronounce the Iqama for the `Isha' prayer and offer two rak`at and perform Taslim. He never prayed any Nawafil in between the two prayers or after the `Isha' prayers till he got up in the middle of the night (for Tahajjud prayer)."
Hadith Reference Sahih Bukhari / The Book of Abridged Or Shortened Prayers (At-Taqsir) / Hadith: 1109
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة
Hadith 1110
حَدَّثَنَا إِسْحَاقُ ، حَدَّثَنَا عَبْدُ الصَّمَدِ ، حَدَّثَنَا حَرْبٌ ، حَدَّثَنَا يَحْيَى ، قَالَ : حَدَّثَنِي حَفْصُ بْنُ عُبَيْدِ اللَّهِ بْنِ أَنَسٍ ، أَنَّ أَنَسًا رَضِيَ اللَّهُ عَنْهُ حَدَّثَهُ ، " أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يَجْمَعُ بَيْنَ هَاتَيْنِ الصَّلَاتَيْنِ فِي السَّفَرِ يَعْنِي الْمَغْرِبَ وَالْعِشَاءَ " .
Narrated Anas bin Malik: Whenever the Prophet started a journey before noon, he used to delay the Zuhr prayer till the time of `Asr and then offer them together; and if the sun declined (at noon) he used to offer the Zuhr prayer and then ride (for the journey).
Hadith Reference Sahih Bukhari / The Book of Abridged Or Shortened Prayers (At-Taqsir) / Hadith: 1110
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة