IN-39
Invocation for fear of Shirk
Allaahumma 'innee 'a'oothu bika 'an 'ushrika bika wa 'anaa 'a'lamu, wa 'astaghfiruka limaa laa 'a'lamu.
O Allah, I seek refuge in You lest I associate anything with You knowingly, and I seek Your forgiveness for what I know not.
Reference: Ahmad 4/403. See also Al-Albani, Sahihul-Jami' As-Saghir 3/233 and Sahihut-Targhib wat- Tarhib 1/19.
Invocation for someone who tells you: "May Allah bless you."
Wafeekabaarakallaahu.
And may Allah bless you.
Reference: Ibn As-Sunni, p. 138, (no. 278). See also Ibn Al-Qayyim, Al-Wdbil As-Sayyib, p. 304, with checking by Basheer Muhammad ‘Uyoon
Invocation against evil portent
Allaahumma laa tayra 'illaa tayruka, wa laa khayra 'illaa khayruka, wa laa 'ilaaha ghayruka.
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 (SAW) 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.