Messenger of Allah, are we working for something already decreed, or for something we are just now beginning?He replied, "For something already decreed."Suraqa then asked, "Then what is the point of action?"The Messenger of Allah ﷺ said, "Every doer is made easy for what he was created to do."
حدثنا هارون بن معروف حدثنا ابن وهب أخبرني عمرو عن أبي الزبير
يا رسول الله أنعمل لأمر قد فرغ منه أم لأمر نأتنفه قال لأمر قد فرغ منه فقال سراقة ففيم العمل إذا فقال رسول الله ﷺ كل عامل ميسر لعمله
Its chain of transmission is sahih, and it has already preceded shortly before with similar wording.