Uthman bin al-'Aswad bin Musa عثمان بن الأسود بن موسى · Chapters on Supplication

“There is not a Muslim upon the earth who calls upon Allah with any supplication, except that Allah grants it to him, or he turns away from him the like of it in evil; as long as he does not supplicate for something sinful, or the severing of the ties of kinship.” So a man from the people said: “What if we should increase (in it)” He (ﷺ) said: “(With) Allah is more.”

“When you go to your bed, perform the Wudu’ as you would perform for Salat. Then lie on your right side, then say: ‘O Allah, I submit my face to You, and I entrust my affair to You, and I lay myself down relying upon You, hoping in You and fearing You. There is no refuge nor escape from You except to You. I believe in Your Book which You have revealed, and in Your Prophet whom You have sent…