WE RELATE IN the Ṣaḥīḥ of Muslim that Mu‘āwiyah ibn al-Ḥakam as-Sulamī
, a Companion, related: “I said: ‘Messenger of Allah, among us there are men who look for omens.’ He
said: ‘That is something that they find in their hearts, so let that not bar them.’” [1].
We relate in the book of Ibn as-Sunnī that ‘Urwah ibn ‘Āmir al-Juhanī
narrated that the Prophet
was asked about omens, and said: “The most truthful of it is a good omen, and it does not repel a Muslim. So if you see any of these omens that you dislike, say: O Allah, none brings about good but You, and none takes away evil but You. There is no power and no strength but by Allah.” [2].

Allāhumma lā ya’tī bi-l-ḥasanāti illā Ant, wa lā yadhhabu bi-s-sayyi’āti illā Ant. Lā ḥawla wa lā quwwata illā bi-llāh.
References
[1] Muslim (537).
[2] Ibn as-Sunnī (294).