The finishing off of the encircled enemy army is to be left to the Luftwaffe.

The left-wing, which consists of armoured and motorized forces and has no enemy in front of it, will be stopped dead in its tracks upon direct order from the Fuhrer.

Bad weather has grounded the Luftwaffe and now we must stand by and watch countless thousands of the enemy getting away to England under our noses.

The war against Russia is an important chapter in the German nation's struggle for existence. [...] The objective of this battle must be the demolition of present-day Russia and must therefore be conducted with unprecedented severity. Every military action must be guided in planning and execution by an iron resolution to exterminate the enemy remorselessly and totally. In particular, no adherents of the contemporary Russian Bolshevik system are to be spared.

The finishing off of the encircled enemy army is to be left to the Luftwaffe.

... the reason is that a military defeat of Britain will bring about the disintegration of the British Empire. This would not be of any benefit to Germany.