The phone call shows that Russian soldiers were close to killing the top general.
The audio it says is from an intercept call was published by the SBU.
The call said to be made by a soldier was about a stand-off with the commander of the 36th Army.
Even though their contracts with the Russian military required them to follow orders, almost all of the remaining 215 troops in the 600-person battalion refused to do so.
Almost all of the battery refused. The man says in the recording that he will whack you if you don't go there.
A kid says to him, "Go ahead, whack!", then he pulls out a grenade and says, "Come on, shoot me!" We will blow up together. The special forces guys were pointing their guns at us. We pointed our guns at them.
We almost shot each other for the sake of it. The voice said that he got on his bobik and left.
After scaling back its war aims, Russia has seen more success in recent weeks.
Russia has taken territory in the eastern part of Ukraine and the country admits it is struggling.
The war has cost Russia a lot, and troops numbers and supplies are low.
The voice on the audio says that the brigade can't capture anything because there's nothing left of it.
Russian troops and mercenaries are refusing to fight in Ukraine, according to reports. The Guardian reported last week that 115 members of Russia's national guard were fired for not fighting.