The execution of his duty is proved as at point 4 above.

He had killed them in the execution of his duty as a soldier.

Nothing impedes him in the execution of his duty, believe me.

One, we will lay down our lives for the successful execution of our duties.

They were both charged with assault on a constable in the execution of his duty.

In fact I must congratulate you on the skillful execution of your duties.

See Assaulting a constable in the execution of his duty.

Here the priors used to supply divine aid in the execution of their duties.

You could be charged with obstructing the police in the execution of their duty.

However, he did not let his thoughts interfere with the swift execution of his duties.