Al-Tabarani recorded in al-Mu'jam al-Kabir and al-Mu'jam al-Awsat, concerning Sayyiduna Abdullah bin Umar (may Allah be pleased with them both): Al-Hajjaj ordered Salim bin Abdullah to kill a man. Salim asked the man: "Have you offered the Subh prayer?" The man replied: "Yes!" Salim said: "Go away!" Al-Hajjaj asked him: "Why did you not kill him?" Salim said: "My father (that is, Sayyiduna Abdullah bin Umar, may Allah be pleased with them both) narrated to me that he heard the Prophet (peace and blessings be upon him) say: 'Whoever offers the Subh prayer is under the protection of Allah for the whole day.'" Salim said: "I disliked killing a man whom Allah Almighty had already granted protection." Al-Hajjaj asked Sayyiduna Abdullah bin Umar (may Allah be pleased with them both): "Did you hear this from the Prophet (peace and blessings be upon him) himself?" Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) replied: "Yes!"
Its chain contains Yahya bin Abd al-Hamid al-Himmani, whom Ahmad declared da'if (weak), while Yahya bin Ma'in declared him thiqah (trustworthy). This narration has another, longer chain than this, which will come later in the chapter on tribulations (al-Fitan).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 1641