Sayyiduna Abu Hurayrah (may Allah be pleased with him) reports this saying of the Prophet (peace and blessings be upon him): "The Lord says: If My servants obeyed Me, I would give them rain at night and make the sun rise upon them by day, and I would not make them hear the sound of thunder."
Ahmad and al-Bazzar recorded it, and he added these words: "The Prophet (peace and blessings be upon him) said: 'Renew your faith!' The people said: O Messenger of Allah! How shall we renew our faith? The Prophet (peace and blessings be upon him) said: 'Renew your faith by saying La ilaha illallah (there is none worthy of worship except Allah)!'" He said: From the Prophet (peace and blessings be upon him)
this narration is reported only with this chain. (Allamah Haythami says:) I say: This narration revolves around Sadaqah bin Musa al-Daqiqi, whom Yahya bin Ma'in and others declared da'if (weak). Muslim bin Ibrahim said: Sadaqah al-Daqiqi narrated to us, and he was saduq (truthful).