Bible Verses About Martyrdom: Should be prepared for

Then said Jesus unto his disciples, If any man would come after me, let him deny himself, and take up his cross, and follow me.

For whosoever would save his life shall lose it: and whosoever shall lose his life for my sake shall find it.

Then Paul answered, What do ye, weeping and breaking my heart? for I am ready not to be bound only, but also to die at Jerusalem for the name of the Lord Jesus.