The word(s) "thankful" appears 22 time(s) in 22 verse(s) in Quran in Muhammad Pickthal translation.

(11) We verily sent Moses with Our revelations, saying: Bring thy people forth from darkness unto light. And remind them of the days of Allah. Lo! therein are revelations for each steadfast, thankful (heart).

(12) Our Lord! Lo! I have settled some of my posterity in an uncultivable valley near unto Thy holy House, our Lord! that they may establish proper worship; so incline some hearts of men that they may yearn toward them, and provide Thou them with fruits in order that they may be thankful.

(13) thankful for His bounties; He chose him and He guided him unto a straight path.

(14) And We taught him the art of making garments (of mail) to protect you in your daring. Are ye then thankful?

(15) And He it is Who hath appointed night and day in succession, for him who desireth to remember, or desireth thankfulness.

(16) And (Solomon) smiled, laughing at her speech, and said: My Lord, arouse me to be thankful for Thy favour wherewith Thou hast favoured me and my parents, and to do good that shall be pleasing unto Thee, and include me in (the number of) Thy righteous slaves.

(17) Of His mercy hath He appointed for you night and day, that therein ye may rest, and that ye may seek His bounty, and that haply ye may be thankful.

(18) And of His signs is this: He sendeth herald winds to make you taste His mercy, and that the ships may sail at His command, and that ye may seek his favour, and that haply ye may be thankful.

(19) They made for him what he willed: synagogues and statues, basins like wells and boilers built into the ground. Give thanks, O House of David! Few of My bondmen are thankful.

(20) If ye are thankless, yet Allah is Independent of you, though He is not pleased with thanklessness for His bondmen; and if ye are thankful He is pleased therewith for you. No laden soul will bear another's load. Then unto your Lord is your return; and He will tell you what ye used to do. Lo! He knoweth what is in the breasts (of men).