Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) narrates: On the day of the Battle of Badr I took some part in the fighting, then I came hurrying to see what the Prophet (peace and blessings be upon him) was doing. The Prophet (peace and blessings be upon him) was in prostration, reciting: 'Ya Hayyu ya Qayyum, ya Hayyu ya Qayyum' (O Ever-Living, O Self-Sustaining; O Ever-Living, O Self-Sustaining), and he was not saying anything more than this. I went back to the fighting; then when I came, I found him in prostration, reciting the same words. Then I went back to the fighting, and when I came, he was still reciting this, until Allah Almighty granted him victory.
Al-Bazzar recorded it, and its chain is hasan (good); Abu Ya'la recorded a similar report in the same way.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأدعية / 17197
Sayyiduna Ali (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "Supplication is the weapon of the believer, the pillar of the religion, and the light of the heavens and the earth."
Abu Ya'la recorded it; its chain contains a narrator, Muhammad bin al-Hasan bin Abi Yazid, who is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأدعية / 17198
Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "Shall I not guide you to something that will save you from your enemy and increase your provision? Supplicate to Allah Almighty by night and by day, for supplication is the weapon of the believer."
Abu Ya'la recorded it; its chain contains a narrator, Muhammad bin Abi Humayd, who is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأدعية / 17199