Musannaf Ibn Abi Shaybah

Hazrat Ka'b says: When the time for iftar would come, a fasting person would face the qiblah and say: O Allah! Grant me deliverance from every calamity that is to descend from the sky to the earth tonight. (He would say this) three times. And when the sunlight would begin to spread, he would say: O Allah! Grant me a share in every goodness that is to descend from the sky. (He would also say this) three times. The narrator says: This person was asked (about these words), so he replied: This is the supplication of Dawud (peace be upon him); grant comfort to your tongues with it, and attach it to your hearts.