Greed for the pleasures of kingship”, here Arjuna is saying

Arjuna Vishada Yoga 

Chapter 1, Verse 45

 

aho bata mahat pāpaṁ 

kartuṁ vyavasitā vayam 

yad rājya sukha lobhena 

hantuṁ sva-janam udyatāḥ

 

Alas! We were engaged in committing a great sin, we who were endeavouring  

to kill our own people through greed for the pleasures of kingship.

 

Arjuna says, “Alas!” Out of wonder and great sorrow, he expresses himself as if this sin has already happened: “We were engaged in committing a great sin.” This shows that Arjuna and the Pandavas have great knowledge and virtue and that they are very careful about doing anything which will bring bad karma to them. They are aware of the effect of karma. He says, “We will have to repay the karma. We will also have to suffer for that karma. And not only in one life, but for many lifetimes we’ll have to come again and again to repay this great sin which we will be committing. This karma will be very dreadful. We will not be free!” 

 

“Greed for the pleasures of kingship”, here Arjuna is saying that one becomes blind and commits dreadful sin because of greed for the kingdom, for the throne. He says, “We will be enjoying the throne; and this enjoyment will be like lust, which will destroy us. It will bring us really terrible karma later on.” Because Arjuna is aware of the effect of the karma, he says, “It is better that we don’t fight.”

Bhagavad Gita