Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tirmidhi:2775ʿAbbās al-ʿAnbarī b. ʿAbd al-ʿAẓīm > al-Naḍr b. Muḥammad > al-Jurashī al-Yamāmī > ʿIkrimah b. ʿAmmār > Iyās b. Salamah from his father > Laqad

from his father who said: "I guided Allah's Prophet ﷺ and Al-Hasan and Al-Husain, on his gray mule until I brought him to the apartment of the Prophet ﷺ, this one was in front of him, and this one behind him."  

Abū ʿĪsá said that this Ḥadīth is Ḥasan-Ṣaḥīḥ-Gharīb in this particular context.
الترمذي:٢٧٧٥حَدَّثَنَا عَبَّاسٌ الْعَنْبَرِيُّ بْنُ عَبْدِ الْعَظِيمِ حَدَّثَنَا النَّضْرُ بْنُ مُحَمَّدٍ هُوَ الْجُرَشِيُّ الْيَمَامِيُّ حَدَّثَنَا عِكْرِمَةُ بْنُ عَمَّارٍ عَنْ إِيَاسِ بْنِ سَلَمَةَ عَنْ أَبِيهِ قَالَ

لَقَدْ قُدْتُ نَبِيَّ اللَّهِ ﷺ وَالْحَسَنَ وَالْحُسَيْنَ عَلَى بَغْلَتِهِ الشَّهْبَاءِ حَتَّى أَدْخَلْتُهُ حُجْرَةَ النَّبِيِّ ﷺ هَذَا قُدَّامُهُ وَهَذَا خَلْفُهُ وَفِي الْبَابِ عَنِ ابْنِ عَبَّاسٍ وَعَبْدِ اللَّهِ بْنِ جَعْفَرٍ  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ غَرِيبٌ مِنْ هَذَا الْوَجْهِ

See similar narrations below:

Collected by Muslim, Ibn Ḥibbān, Ṭabarānī
muslim:2423ʿAbdullāh b. al-Rūmī al-Yamāmī And ʿAbbās b. ʿAbd al-ʿAẓīm al-ʿAnbarī > al-Naḍr b. Muḥammad > ʿIkrimah Wahū Ibn ʿAmmār > Iyās from his father

I (had the honour of) leading the white mule on which rode Allah's Apostle ﷺ and with him were Hasan and Husain, till it reached the apartment of Allah's Apostle ﷺ. The one amongst them was seated before him and the other one was seated behind him.  

مسلم:٢٤٢٣حَدَّثَنِي عَبْدُ اللَّهِ بْنُ الرُّومِيِّ الْيَمَامِيُّ وَعَبَّاسُ بْنُ عَبْدِ الْعَظِيمِ الْعَنْبَرِيُّ قَالاَ حَدَّثَنَا النَّضْرُ بْنُ مُحَمَّدٍ حَدَّثَنَا عِكْرِمَةُ وَهُوَ ابْنُ عَمَّارٍ حَدَّثَنَا إِيَاسٌ عَنْ أَبِيهِ قَالَ

لَقَدْ قُدْتُ بِنَبِيِّ اللَّهِ ﷺ وَالْحَسَنِ وَالْحُسَيْنِ بَغْلَتَهُ الشَّهْبَاءَ حَتَّى أَدْخَلْتُهُمْ حُجْرَةَ النَّبِيِّ ﷺ هَذَا قُدَّامَهُ وَهَذَا خَلْفَهُ  

ذِكْرُ إِبَاحَةِ اسْتِعْمَالِ الْمَرْءِ الِارْتِدَافَ وَالتَّعْقِيبَ عَلَى الدَّابَّةِ الْوَاحِدَةِ إِذَا عَلِمَ قِلَّةَ تَأَذِّي الدَّابَّةِ بِهِ

ibnhibban:5618Abū Yaʿlá > ʿAbdullāh b. al-Rūmī > al-Naḍr b. Muḥammad > ʿIkrimah b. ʿAmmār > Iyās b. Salamah b. al-Akwaʿ from his father

I (had the honour of) leading the white mule on which rode Allah's Apostle ﷺ and with him were Hasan and Husain, till it reached the apartment of Allah's Apostle ﷺ. The one amongst them was seated before him and the other one was seated behind him. (Using translation from Muslim 2423)  

ابن حبّان:٥٦١٨أَخْبَرَنَا أَبُو يَعْلَى قَالَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ الرُّومِيِّ قَالَ حَدَّثَنَا النَّضْرُ بْنُ مُحَمَّدٍ قَالَ حَدَّثَنَا عِكْرِمَةُ بْنُ عَمَّارٍ قَالَ حَدَّثَنَا إِيَاسُ بْنُ سَلَمَةَ بْنِ الْأَكْوَعِ عَنْ أَبِيهِ قَالَ

«لَقَدْ قُدْتُ بِنَبِيِّ اللَّهِ ﷺ وَالْحَسَنِ وَالْحُسَيْنِ عَلَى بَغْلَتِهِ الشَّهْبَاءِ حَتَّى أَدْخَلْتُهُمْ حُجْرَةَ النَّبِيِّ ﷺ هَذَا قُدَّامَهُ وَهَذَا خَلْفَهُ»  

tabarani:6247ʿAbdān b. Aḥmad And Muḥammad b. ʿAbdullāh al-Ḥaḍramī > al-ʿAbbās b. ʿAbd al-ʿAẓīm al-ʿAnbarī > al-Naḍr b. Muḥammad > ʿIkrimah b. ʿAmmār > Iyās b. Salamah from his father

I (had the honour of) leading the white mule on which rode Allah's Apostle ﷺ and with him were Hasan and Husain, till it reached the apartment of Allah's Apostle ﷺ. The one amongst them was seated before him and the other one was seated behind him. (Using translation from Muslim 2423)   

الطبراني:٦٢٤٧حَدَّثَنَا عَبْدَانُ بْنُ أَحْمَدَ وَمُحَمَّدُ بْنُ عَبْدِ اللهِ الْحَضْرَمِيُّ قَالَا ثنا الْعَبَّاسُ بْنُ عَبْدِ الْعَظِيمِ الْعَنْبَرِيُّ ثنا النَّضْرُ بْنُ مُحَمَّدٍ ثنا عِكْرِمَةُ بْنُ عَمَّارٍ عَنْ إِيَاسِ بْنِ سَلَمَةَ عَنْ أَبِيهِ قَالَ

«جَاءَ نَبِيُّ اللهِ ﷺ وَالْحَسَنُ وَالْحُسَيْنُ عَلَى بَغْلَتِهِ الشَّهْبَاءِ حَتَّى أَدْخَلَهُمْ حُجْرَةَ النَّبِيِّ ﷺ هَذَا قُدَّامَهُ وَهَذَا خَلْفَهُ»