Sayyiduna Suraqah bin Malik (may Allah be pleased with him) said: I said: "O Messenger of Allah! Do we act upon that over which the Pen has dried and the decrees have been set, or upon a matter yet to come?" He (peace and blessings be upon him) said: "O Suraqah! Act for that over which the Pen has dried and the decrees have been set, for each one is eased (towards what he was created for)."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6558