It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: On the day of Friday, the angels stand at the doors of the mosque and record the ranks of the people, that such-and-such a person came at such-and-such a time, such-and-such a person came at such-and-such a time, such-and-such a person came when the Imam was delivering the sermon, and such-and-such a person came and only got the prayer but did not get the Friday (reward). They write this as long as someone has not missed the sermon.