The word(s) "confidence" appears 3 time(s) in 3 verse(s) in Quran in Mohsin Khan translation.

(1) [Musa (Moses)] said: "O my Lord! Open for me my chest (grant me self-confidence, contentment, and boldness).

(2) And strive hard in Allah's Cause as you ought to strive (with sincerity and with all your efforts that His Name should be superior). He has chosen you (to convey His Message of Islamic Monotheism to mankind by inviting them to His religion of Islam), and has not laid upon you in religion any hardship: it is the religion of your father Ibrahim (Abraham) (Islamic Monotheism). It is He (Allah) Who has named you Muslims both before and in this (the Qur'an), that the Messenger (Muhammad صلى الله عليه وسلم) may be a witness over you and you be witnesses over mankind! So perform As-Salat (Iqamat-as-Salat), give Zakat and hold fast to Allah [i.e. have confidence in Allah, and depend upon Him in all your affairs]. He is your Maula (Patron, Lord), what an Excellent Maula (Patron, Lord) and what an Excellent Helper!

(3) And (remember) when the Prophet (صلى الله عليه وسلم) disclosed a matter in confidence to one of his wives (Hafsah), then she told it (to another i.e. 'Aishah). And Allah made it known to him; he informed part thereof and left a part. Then when he told her (Hafsah) thereof, she said: "Who told you this?" He said: "The All-Knower, the All-Aware (Allah) has told me."