Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "The one who has no prayer has no share in Islam, and the one who has no ablution has no prayer."
Al-Bazzar recorded it; its chain contains Abdullah bin Sa'id bin Abi Sa'id, and the hadith scholars are agreed that he is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 1612