Reference : Hisn al-Muslim 205

اللّهُـمَّ لا طَيْـرَ إِلاّ طَيْـرُك، 
وَلا خَـيْرَ إِلاّ خَـيْرُك، 
وَلا إِلهَ غَيْـرُك
Allāhumma lā ṭayra illā ṭayruk, 
wa lā khayra illā khayruk, 
wa lā ilāha ghayruk.


O Allah there is no portent other than Your portent, 
no goodness other than Your goodness, 
and none worthy of worship other than You.

Reference:
Ahmad 2/220, Ibn As-Sunni (no. 292). See also Al-Albani, 
Silsilatul-'Ahadlth As-Sahihah 3/54, (no. 1065). As for bodings of good, 
these used to please the Prophet (ﷺ) and so when he heard good words from 
someone, he used to say: "We have taken from you a good portent from your 
mouth," Abu Dawud, Ahmad. See also Al-Albani, Silsilatul-'Ahadith 
As-Sahihah 2/363, and it is with Abu Ash-Shaikh Al-Asfahani in 
'Akhlaqun-Nabiyy, pg. 270.

Chapter: The scorn of ascribing things to evil omens