Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "We are the last of the nations, but the first to be called to account. It will be said there: Where is the Ummah of Muhammad and its Prophet? We are the last to come (in the world), but the first to be called to account (in the Hereafter)."