The noble Sahaba ra of Rasool Allah proved their love by sacrificing their own selves, their lives and their properties for him. They loved him more than their own selves, their parents and their family. The Seerah is filled with display of this utmost love. Some incidents are being mentioned below.
Abu Bakr Siddiq
The Quraish of Makkah made a plot to murder the Holy Prophet. Allah had given the order for migration to Medina. At night, in the cover of darkness, the Holy Prophet and Abu Bakr left Makkah and arrived at a Cave called Thor where they decided to take refuge.
(The shoes of Abu Bakr) were worn out; some said he used to walk tiptoe in order not to leave a trail behind him. Abu Bakr, first entered to explore the cave and be sure that it was safe, closed all holes with pieces torn off from his clothes, cleaned it and then asked the Prophet (saw)to step in. The Prophet went in and immediately laid his head in Abu Bakr’s lap and fell asleep. Suddenly Abu Bakr’s foot was stung by a poisonous insect, but he did not stir or move despite the pain, fearing Muhammad saw might wake up. (Mubarakpuri, The Sealed Nectar)
This was how much the Sahaba loved Prophet Muhammad (saw), they were willing to sacrifice their life and bear so much suffering and pain.
Ali ibn Abi Talib
The Quraish of Makkah had made a plan to assassinate the Holy Prophet (saw) and they had laid siege to the House of Rasool Allah.
The Prophet told ‘Ali to sleep in his bed and cover himself with his green mantle and assured him full security under Allah’s protection and told him that no harm would come to him. The Prophet [pbuh] then came out of the room and cast a handful of dust at the assassins and managed to work his way through them reciting verses of the Noble Quran (36:09) and went towards Medina with Abu Bakr. [Mubarakpuri]
Despite grave danger of attack from the Quraish, Ali slept in the bed of Rasool Allah, endangering his own life, for the sake of Rasool Allah.