It is narrated from Sayyiduna Samurah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever misses the Friday (prayer), let him give a dinar in charity, and if he does not find it, then let him give half a dinar in charity."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6881