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
ahmad:4881 – ʿAbd al-Razzāq > Maʿmar > al-Zuhrī > Sālim > Ibn ʿUmar

[Machine] He used to dislike conditions for pilgrimage and would say, "Do you not trust in the Sunnah of your Prophet, peace be upon him? He did not impose any conditions."  

أحمد:٤٨٨١ – حَدَّثَنَا عَبْدُ الرَّزَّاقِ أَخْبَرَنَا مَعْمَرٌ عَنِ الزُّهْرِيِّ عَنْ سَالِمٍ عَنِ ابْنِ عُمَرَ

أَنَّهُ كَانَ يَكْرَهُ الِاشْتِرَاطَ فِي الْحَجِّ وَيَقُولُ أَمَا حَسْبُكُمْ بِسُنَّةِ نَبِيِّكُمْ ﷺ إِنَّهُ لَمْ يَشْتَرِطْ  

See similar narrations below:

Collected by Tirmidhī
tirmidhi:942 – Aḥmad b. Manīʿ > ʿAbdullāh b. al-Mubārak > Maʿmar > al-Zuhrī > Sālim from his father

His father disliked making a condition during Hajj and he said: 'Is not the Sunnah of your Prophet enough for you?"  

Abū ʿĪsá said that this Ḥadīth is Ḥasan-Ṣaḥīḥ.
الترمذي:٩٤٢ – حَدَّثَنَا أَحْمَدُ بْنُ مَنِيعٍ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ الْمُبَارَكِ أَخْبَرَنِي مَعْمَرٌ عَنِ الزُّهْرِيِّ عَنْ سَالِمٍ عَنْ أَبِيهِ

أَنَّهُ كَانَ يُنْكِرُ الاِشْتِرَاطَ فِي الْحَجِّ وَيَقُولُ أَلَيْسَ حَسْبُكُمْ سُنَّةَ نَبِيِّكُمْ ﷺ  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ