ANSWER:

When you get out of your house.

“Whoever says – when he leaves his house – Bismillaah, tawakkaltu ‘ala Allaah, wa laa hawla wa laa quwwata illa Billaah (In the name of Allaah, I put my trust in Allaah and there is no power and no strength except with Allaah)” , it will be said to him: You are taken care of and you are protected and guided, and the devils will move away from him, and one devil says: What can you do with a man who has been guided, taken care of and protected? 

Dua while leaving home should be recited after stepping out or when I’m still inside my home.

Supplications | July 2, 2018 8:10 am
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When talking or making dua to Allah (S.W.T) does His response come into the mind of the person making the dua? For instance, if I say in my mind: “Don’t abandon me Allah” and a thought strikes up: “I won’t abandon you”, can we really say that this response is from Him, because even thoughts are owned by Him. With this a conversation can take place in the person’s mind with Allah (S.W.T).
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As we know raising hands for dua is better answerable to Allah. So is it better to raise our two hand while we do dua as morning & evening adhkar??