The word(s) "seal" appears 19 time(s) in 19 verse(s) in Quran in Abdullah Yusuf Ali translation.

(11) Muhammad is not the father of any of your men, but (he is) the Messenger of Allah, and the seal of the Prophets: and Allah has full knowledge of all things.

(12) That Day shall We set a seal on their mouths. But their hands will speak to us, and their feet bear witness, to all that they did.

(13) "(Such) as dispute about the Signs of Allah, without any authority that hath reached them, grievous and odious (is such conduct) in the sight of Allah and of the Believers. Thus doth Allah, seal up every heart - of arrogant and obstinate Transgressors."

(14) What! Do they say, "He has forged a falsehood against Allah"? But if Allah willed, He could seal up thy heart. And Allah blots out Vanity, and proves the Truth by His Words. For He knows well the secrets of all hearts.

(15) Then seest thou such a one as takes as his god his own vain desire? Allah has, knowing (him as such), left him astray, and sealed his hearing and his heart (and understanding), and put a cover on his sight. Who, then, will guide him after Allah (has withdrawn Guidance)? Will ye not then receive admonition?

(16) And among them are men who listen to thee, but in the end, when they go out from thee, they say to those who have received Knowledge, "What is it he said just then?" Such are men whose hearts Allah has sealed, and who follow their own lusts.

(17) That is because they believed, then they rejected Faith: So a seal was set on their hearts: therefore they understand not.

(18) Their thirst will be slaked with Pure Wine sealed:

(19) The seal thereof will be Musk: And for this let those aspire, who have aspirations: