Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) states: When we found a man absent from the morning prayer, we would think ill of him.
Imam al-Bazzar recorded this narration, and its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2152