The word(s) "constancy" appears 16 time(s) in 16 verse(s) in Quran in Abdullah Yusuf Ali translation.

(11) "O my son! establish regular prayer, enjoin what is just, and forbid what is wrong: and bear with patient constancy whatever betide thee; for this is firmness (of purpose) in (the conduct of) affairs.

(12) Then, when (the son) reached (the age of) (serious) work with him, he said: "O my son! I see in vision that I offer thee in sacrifice: Now see what is thy view!" (The son) said: "O my father! Do as thou art commanded: thou will find me, if Allah so wills one practising Patience and constancy!"

(13) "And take in thy hand a little grass, and strike therewith: and break not (thy oath)." Truly We found him full of patience and constancy. How excellent in Our service! ever did he turn (to Us)!

(14) Therefore be patient with constancy to the Command of thy Lord, and hearken not to the sinner or the ingrate among them.

(15) Then will he be of those who believe, and enjoin patience, (constancy, and self-restraint), and enjoin deeds of kindness and compassion.

(16) Except such as have Faith, and do righteous deeds, and (join together) in the mutual teaching of Truth, and of Patience and constancy.