During Mahabharat, Duryodhan taunted Bheeshma that he was being lenient with the Pandavas. Bheeshma felt insulted, and resolved that by next day, he would either kill Arjun, or to protect him, Shree Krishna would have to break his vow and lift weapons.
The news spread..

In Pandava camp. Everyone including Shree Krishna got worried as Bheeshma was known for keeping his vows.
Shri Krishna kept thinking till midnight and wondered “if I am so concerned, how worried must Arjun be, for it is his death that Bheeshma has announced”. He walked over to..

Arjun’s tent to console him. However he found Arjun fast asleep. Shri Krishna shook him awake, “My friend, do you not know about the cow made by Bheeshma?”
“Ofcourse, I do, my lord”
“Then are you not worried?”

“When you are so concerned about my protection that you are unable to sleep all night, then why should I worry for myself”

This is the vishvas we need to have on our Bhagvan that he will always protect us! So whatever you are going through, Keep calm and trust Shri Krishna