Any good that befalls you is from God, and any bad that befalls you is from yourself. We have sent you as a messenger to the people and God is enough as a witness.
Translation endnotes
[4:79] Everything is under God's control (4:78; 8:17) and bad things happen to us because of our wrong choices (42:30; 64:11). For instance, one may harm himself by putting his hand in the fire, and the harm is invited by his action. However, since the fire operates and burns according to God's law, it is from God. It is noteworthy that the word indi (side) in verse 4:78, which indicates intervening causes, does not exist in verse 4:79. In the former the indirectness of the relationship and, in the latter, the directness of the relationship is implied. Also, see 57:22-23.