Mukhtasar Muslim (Abridged) 426 — Severe warning for missing Friday

It is narrated from Hakam bin Mina that Abdullah bin Umar and Abu Hurairah (may Allah be pleased with them) told him that they heard the Messenger of Allah (peace and blessings be upon him) say, while he was standing on the wooden pulpit: "People must stop neglecting Jumu'ah, or else Allah will seal their hearts and they will become among the heedless."