It is narrated from Sayyiduna Samurah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Attend the Friday prayer and sit close to the imam, for a man has a rank appointed for him in Paradise, but he lags behind at the Friday prayer (in sitting forward), so he too is put back (from that rank of Paradise)."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6824