The Complete Science of Bhakti-Yoga #3-
The Nectar of Devotion–72/10/26 Vrndavana
1043) Whether I know Krsna wants to protect His devotees! Taught by Srila Prabhupada!
—— When Krsna was fighting with Bhisma… You know the story, that Bhisma was criticized by Duryodhana: “My dear Grandfather, you are not fighting in full strength with Arjuna because the, on the other side, they are your grandsons, and you have got, you have got very natural affection for them. So I think you are not fighting according to your strength. Otherwise, they would have been finished by this time.” So Bhisma also could understand that, his criticism. Then he promised immediately that: “Tomorrow I shall finish all these five brothers. Will that be happy for you? So I am keeping five arrows to be used tomorrow for killing these five brothers.” So Duryodhana became doubtful. So he request grandfather, “My dear grandfather, may I keep these five arrows with me so that you can take it from me tomorrow and use it?” “All right, you keep it.”
So Krsna could understand that “Now Bhisma has promised to kill the Pandavas tomorrow, and he has selected five arrows for them.” So He has to protect His devotees. ———————————————————————