Some of the events where the prominent companions of the prophet were tested

first is the battle of chains:

there was a tribe in Najd who was a bitter enemy of the prophet. The Prophet has said that the Satan’s horn will rise from Najd. This tribe took protection of the mountains and prepared an army to fight the Muslims and the Prophet Muhammad PBUH. the prophet gave leadership of an army to Abu bakar and ordered to fight them tell they were finished. Abu Baker wasn't considered a strong fighter or general the enemy asked who he was and Abubakar replied I'm here to finish you they told him that we are large in number and if he doesn't leave we will kill him and send his head and body to Medina upon hearing this he'd retreated the prophet upon seeing Abubakar scolded him and as dinner didn't they tell you to stay there and fight till the end

After this the prophet gave the flag to Omar and asked him to go to fight the enemy. It was again a test of Omar and his bravery but the same thing happened the army kept going back and forth and Omar came back empty handed as he was scared. The prophet blamed him that I had given explicit orders to fight those people and not to return till they were defeated.

After this the prophet gave the commandership to Amir Abbas to lead the army Amir was considered a skillful general but he also retreated. Next slide after three failed attempts prophet gave the flag to imam Ali al Salam hey Mama Lee went to the army who asked who was he and he replied I am Ali son of Abu Talib. He did not retreat he camped nearby and then the next morning he started the sudden war one hour before the dawn. Victory was given by Allah and imam Ali tied all of the enemy in chains and brought them to Medina. This is also the point when the Surah al Hadid was revealed.

Upon seeing the victory of imam Ali AS the prophet said that if I wasn't worried that what will people do after hearing what I know about your attributes I would tell them your blessings and they would start truly revering you.

Another event discussed in this podcast is the story of the father of the Khawarij.

the prophet asked Abu bakar to go and kill this person but he came back and said prophet how can I kill that person because I saw him in Salah then the prophet asked Omar to kill that person and Omer came back saying I could not kill that person because he was in sujood. Then the prophet asked him out earlier list Salam to go and kill that person but imam Ali al Islam came back and said I could not find that person then the prophet told immaterial Islam that you will see that person in the battle of nahrawan and you will kill that person. After the battle of nahrawan, Imam Ali AS asked this companions if they found that person the companions came back in they said they did not find that person. So Imam Ali AS himself vent and found the person and told them that the prophet did not lie and this is the person. The way I recognize this person is with his third breast.

Another point when both Omar and Abubakar disobeyed the prophet was when they were ordered to go under the army of Osama and they did not go but hey mom was not asked to do so. This shows that imam Ali AS was both superior to both Omar and Abu bakar and he completed the orders of the prophet which others fail to do so.