Allah Ta‘ala mentions in the Quraan Kareem regarding the Sahaabah (radhiyallahu ‘anhum):
وَالسّٰبِقُونَ الْاَوَّلُونَ مِنَ الْمُهٰجِرِينَ وَالْاَنصَارِ وَالَّذِينَ اتَّبَعُوهُم بِإِحْسَانٍ لا رَضِيَ اللّٰهُ عَنْهُمْ وَرَضُوا عَنْهُ وَاَعَدَّ لَهُمْ جَنّٰتٍ تَجْرِيْ تَحْتَهَا الْأَنْهٰرُ خٰلِدِينَ فِيهَا اَبَدًا ط ذٰلِكَ الْفَوْزُ الْعَظِيمُ
And the first forerunners (in Deen) among the Muhaajireen and the Ansaar and those who followed them in goodness, Allah is pleased with them and they are pleased with Him, and He has prepared for them gardens beneath which rivers flow, wherein they will live forever. That is the supreme achievement. (Surah Taubah: 100)
The ardent love and extraordinary devotion which the Sahaabah (radhiyallahu ‘anhum) showed to Rasulullah (sallallahu ‘alaihi wasallam) can easily be gauged from the observation and testimony of the Kuffaar of that time.
When the Treaty of Hudaybiyah was being discussed, Hazrat Urwah bin Masood (radhiyallahu ‘anhu), a messenger of the Quraish (who later on embraced Islam), had an opportunity to carefully observe and study the behaviour and conduct of the Sahaabah (radhiyallahu ‘anhum) towards Rasulullah (sallallahu ‘alaihi wasallam).
When he returned to his people, he said to them,
“O, Quraish! I have been an envoy to many great kings. I have seen the courts of Caesar, the Chosroes and the Negus. By Allah! Nowhere have I seen the people around a king or ruler so respectful to him as I found the companions of Muhammad (sallallahu ‘alaihi wasallam).
“When Muhammad (sallallahu ‘alaihi wasallam) spits, they rush to take the spit in their hands before it touches the ground and anoint their faces and bodies with it. When he issues any instruction, they all rush to carry it out.
“When he makes Wudhu, they vie with one another to collect a drop of the used water before it falls on the ground. If anyone fails to get that water, he touches the wet hands of the person who managed to get some and then rubs his hands on his face.
“When they speak in his presence, they speak in a low voice and never lift their gaze to look at his face, out of respect for him. A hair falling from his head or beard is preserved to get blessings from it and then they treat it with tremendous reverence and respect.
“In short, I have never seen any group of people love their master and show so much devotion to him as I have seen the companions of Muhammad (sallallahu ‘alaihi wasallam) love him and show devotion to him.” (Saheeh Bukhaari #2731, Fazaail-e-Aamaal Pg. 166)
May Allah Ta‘ala bless us with the true love of Rasulullah (sallallahu ‘alaihi wasallam) and his Sahaabah (radhiyallahu ‘anhum) and grant us the Tawfeeq of emulating the Mubaarak Sunnah in all facets of our life.