Hereunder are incidents of the Sahaabah RadhiAllaahu Anhum who had extreme love for those things and places connected to Rasulullaah SalAllaahu Alaihi Wa Sallam - Part 1

1.) Ibraheem ibn Abdur Rahmaan ibn Abdul Qaari says that he saw Abdullaah ibn Umar RadhiAllaahu Anhu place his hand on the place where Rasulullaah SalAllaahu Alaihi Wa Sallam sat on his pulpit and then put that hand on his face
(Tabaqaatul-Kubraa of Ibn Sa’d vol. 1 page 218)

2.) Another narration from Yazeed ibn Abdullaah ibn Qusayt states that when the Masjid (Nabawi) was empty, he saw several Sahaabah RadhiAllaahu Anhum use their right hands to pick up some of the shiny and smooth sand from that side of the pulpit which adjoined Rasulullaah SalAllaahu Alaihi Wa Sallam's grave. They then made duaa facing the Qiblah.
(ibid)

3.) Zuhri reports,

"Someone whose dependability is unquestionable from the Ansaar mentioned to me that whenever Rasulullaah SalAllaahu Alaihi Wa Sallam made wudhu or spat, the Sahaabah RadhiAllaahu Anhum would race to get his saliva (and leftover wudhu water) to rub it on their faces and bodies.

“Why do you do this?" asked Rasulullaah SalAllaahu Alaihi Wa Sallam.

"Because we seek blessings from it," came the reply.

Rasulullaah SalAllaahu Alaihi Wa Sallam then told them, "Whoever loves to be loved by Allaah and by His Messenger should always speak the truth, return trusts and should never harm his neighbour."
(Bayhaqi in Shuabul-Imaan no. 9104)

4.) Abu Quraad Sulami RadhiAllaahu Anhu says,

“We were with Rasulullaah SalAllaahu Alaihi Wa Sallam when he asked for some water. (When it was brought) Rasulullaah SalAllaahu Alaihi Wa Sallam dipped his hand in the water and started performing wudhu. As the water dripped off (his limbs), we drank it up.

‘What makes you do this?’ Rasulullaah SalAllaahu Alaihi Wa Sallam asked.

We replied, ‘It is the love for Allaah and His Rasulullaah SalAllaahu Alaihi Wa Sallam (that makes us do this).’

Rasulullaah SalAllaahu Alaihi Wa Sallam then said, 'If you want Allaah and His Rasulullaah SalAllaahu Alaihi Wa Sallam to love you, you should return something placed in your trust, always speak the truth and behave politely towards the neighbours in your vicinity.’”
(Al-Mu’jamul-Awsat of Tabaraani no. 6517)

5.) Miswar ibn Makhramah RadhiAllaahu Anhu and Marwaan RadhiAllaahu Anhu narrate a lengthy narration concerning the Treaty of Hudaybiyyah. This narration states that - as Urwa was negotiating with Rasulullaah SalAllaahu Alaihi Wa Sallam - he started observing the Sahaabah RadhiAllaahu Anhum very closely.

He says, “By Allaah! Even when Rasulullaah SalAllaahu Alaihi Wa Sallam would spit, someone would catch it and rub it on his face and body. Whenever he issued any command, the Sahaabaah RadhiAllaahu Anhum would immediately carry it out and when he made wudhu, they get close to fighting with each other to get the water falling off his limbs. They always lower their voices when speaking to him and do not look him in the eye out of respect for him.”

Urwa then returned to his people and said to them, “O people! I have been to the royal courts of Caesars, Chosroes and Negus. I have never seen the followers of any ruler so devoted to him as the followers of Muhammad SalAllaahu Alaihi Wa Sallam are to him.”
(Bukhaari no. 2731, Saheeh Ibn Hibbaan no.4872, As-Sunanul-Kubra of  Bayhaqi no.18807)