The word(s) "seas" appears 22 time(s) in 21 verse(s) in Quran in Saheeh International translation.

(1) In their hearts is disease, so Allah has increased their disease; and for them is a painful punishment because they [habitually] used to lie.

(2) So you see those in whose hearts is disease hastening into [association with] them, saying, "We are afraid a misfortune may strike us." But perhaps Allah will bring conquest or a decision from Him, and they will become, over what they have been concealing within themselves, regretful.

(3) [Remember] when the hypocrites and those in whose hearts was disease said, "Their religion has deluded those [Muslims]." But whoever relies upon Allah - then indeed, Allah is Exalted in Might and Wise.

(4) But as for those in whose hearts is disease, it has [only] increased them in evil [in addition] to their evil. And they will have died while they are disbelievers.

(5) And [mention] when Moses said to his servant, "I will not cease [traveling] until I reach the junction of the two seas or continue for a long period."

(6) And draw in your hand to your side; it will come out white without disease - another sign,

(7) [That is] so He may make what Satan throws in a trial for those within whose hearts is disease and those hard of heart. And indeed, the wrongdoers are in extreme dissension.

(8) Is there disease in their hearts? Or have they doubted? Or do they fear that Allah will be unjust to them, or His Messenger? Rather, it is they who are the wrongdoers.

(9) And it is He who has released [simultaneously] the two seas, one fresh and sweet and one salty and bitter, and He placed between them a barrier and prohibiting partition.

(10) And put your hand into the opening of your garment [at the breast]; it will come out white without disease. [These are] among the nine signs [you will take] to Pharaoh and his people. Indeed, they have been a people defiantly disobedient."