Mark 10:40

10:40 but to sit at my right or at my left is not mine to give. It is for those for whom it has been prepared.” ¹ 

Mark 13:27

13:27 Then he will send angels and they will gather his elect from the four winds, from the ends of the earth to the ends of heaven. ² 

[10:40]  ¹ sn After the first passion prediction in 8:31 Jesus rebuked Peter as having been used by Satan. After the second passion prediction in 9:31 the disciples were concerned about who would be the greatest in the kingdom. After the third passion prediction in 10:33 James and John asked for positions of honor and rulership in the kingdom, revealing their complete misunderstanding of the nature of the kingdom and exposing their inadequacy as true disciples of Jesus. Jesus replied that such positions were for those for whom it has been prepared.

[13:27]  ² tn Or “of the sky”; the Greek word οὐρανός (ouranos) may be translated “sky” or “heaven,” depending on the context.