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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
tabarani:16561 – Muḥammad b. Ṣāliḥ b. al-Walīd al-Narsī > Muḥammad b. Yaḥyá al-Azdī > Muḥammad b. ʿUmar al-Wāqidī > ʿAbdullāh b. Munīb > ʿUthaym b. Kathīr b. Kulayb al-Juhanī > Bīh from his grandfather And Kānat Lah Ṣuḥbah

[Machine] The Messenger of Allah ﷺ said, "The eldest among siblings is like a father."  

الطبراني:١٦٥٦١ – حَدَّثَنَا مُحَمَّدُ بْنُ صَالِحِ بْنِ الْوَلِيدِ النَّرْسِيُّ ثنا مُحَمَّدُ بْنُ يَحْيَى الْأَزْدِيُّ ثنا مُحَمَّدُ بْنُ عُمَرَ الْوَاقِدِيُّ ثنا عَبْدُ اللهِ بْنُ مُنِيبٍ عَنْ عُثَيْمِ بْنِ كَثِيرِ بْنِ كُلَيْبٍ الْجُهَنِيِّ عَنْ أبِيهِ عَنْ جَدِّهِ وَكَانَتْ لَهُ صُحْبَةٌ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «الْأَكْبَرُ مِنَ الْإِخْوَةِ بِمَنْزِلَةِ الْأَبِ»  

See similar narrations below:

Collected by Suyūṭī
suyuti:10130a –
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السيوطي:١٠١٣٠a –

"الأكُبَرُ مِنَ الإِخْوةِ بِمَنْزلَةِ الأبِ" .  

[عد] ابن عدى في الكامل [طب] الطبرانى في الكبير [هب] البيهقى في شعب الإيمان عن غنيم بن كثير بن كليب الجهنى عن أبيه عن جده