The word(s) "truly" appears 170 time(s) in 163 verse(s) in Quran in Abdullah Yusuf Ali translation.

(31) For them is a penalty in the life of this world, but harder, truly, is the penalty of the Hereafter: and defender have they none against Allah.

(32) And remember! your Lord caused to be declared (publicly): "If ye are grateful, I will add more (favours) unto you; But if ye show ingratitude, truly My punishment is terrible indeed."

(33) "O our Lord! truly Thou dost know what we conceal and what we reveal: for nothing whatever is hidden from Allah, whether on earth or in heaven.

(34) "Praise be to Allah, Who hath granted unto me in old age Isma'il and Isaac: for truly my Lord is He, the Hearer of Prayer!

(35) They say: "O thou to whom the Message is being revealed! truly thou art mad (or possessed)!

(36) To those who leave their homes in the cause of Allah, after suffering oppression,- We will assuredly give a goodly home in this world; but truly the reward of the Hereafter will be greater. If they only realised (this)!

(37) Has then your Lord (O Pagans!) preferred for you sons, and taken for Himself daughters among the angels? truly ye utter a most dreadful saying!

(38) "And they say: 'Glory to our Lord! truly has the promise of our Lord been fulfilled!'"

(39) When they had passed on (some distance), Moses said to his attendant: "Bring us our early meal; truly we have suffered much fatigue at this (stage of) our journey."

(40) Moses said: "Thou wilt find me, if Allah so will, (truly) patient: nor shall I disobey thee in aught."