Hadith 14 of the book of belief (faith) by Sahih al-Bukhari
(14) To love the Messenger (Muhammad) is a part of faith
حَدَّثَنَا أَبُو الْيَمَانِ، قَالَ: أَخْبَرَنَا شُعَيْبٌ، قَالَ: حَدَّثَنَا أَبُو الزِّنَادِ، عَنِ الْأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ، أَن رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ، قَالَ: "فَوَالَّذِي نَفْسِي بِيَدِهِ، لَا يُؤْمِنُ أَحَدُكُمْ حَتَّى أَكُونَ أَحَبَّ إِلَيْهِ مِنْ وَالِدِهِ وَوَلَدِهِ".
Sahih hadith: Narrated Abu Huraira: Allah's Apostle said, By Him in Whose Hands my life is, none of you will have faith till he loves me more than his father and his children.
Reference: Sahih al-Bukhari 1: Chapter 2, Hadith 14.
Hadith 8 of the book of belief (faith) by Sahih al-Bukhari
حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى، قَالَ: أَخْبَرَنَا حَنْظَلَةُ بْنُ أَبِي سُفْيَانَ، عَنْ عِكْرِمَةَ بْنِ خَالِدٍ، عَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا، قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: "بُنِيَ الْإِسْلَامُ عَلَى خَمْسٍ، شَهَادَةِ أَنْ لَا إِلَهَ إِلَّا اللَّهُ وَأَنَّ مُحَمَّدًا رَسُولُ اللَّهِ، وَإِقَامِ الصَّلَاةِ، وَإِيتَاءِ الزَّكَاةِ، وَالْحَجِّ، وَصَوْمِ رَمَضَانَ".
Sahih hadith: Narrated Ibn 'Umar: Allah's Apostle said: Islam is based on (the following) five (principles):
1. To testify that none has the right to be worshipped but Allah and Muhammad is Allah's Apostle.
2. To offer the (compulsory congregational) prayers dutifully and perfectly.
3. To pay Zakat (i.e. obligatory charity) .
4. To perform Hajj. (i.e. Pilgrimage to Mecca).
5. To observe fast during the month of Ramadan.
Reference: Sahih al-Bukhari 1: Chapter 2, Hadith 8.