What does Islam say about Prophet Isa (pbuh) walking on water?

Question:
What does Islam say about Prophet Isa (pbuh) walking on water?

Answer:
One of the ways for identifying prophets is through miracles; extraordinary actions that can't be taught or learned by normal people that others aren't capable of doing. [1]
Prophet Isa (pbuh) had several miracles, namely: awakening the dead, curing those born blind and curing the sick. The Quran says: “…and when You made out of clay the figure of the bird by My leave, you breathed into it and it became a bird by My Leave; and you healed those born-blind and the lepers by My Leave and when you brought the dead to life by My Leave…” [2] Nevertheless, walking on water hasn’t been mentioned in the Quran, although it has been pointed to in a hadith by Imam Sadiq (as). [3]

Refrence:

[1] Jafar Sobhani, Al-Ilahiyyat fil-Kitabi wal-Sunnah, vol. 2, p. 64.
[2] Maidah:110
[3] Mohammad Baqir Majlisi, Biharul-Anwar, vol. 14, p. 254:
اتَّقُوا اللهَ وَ لَا يَحْسُدْ بَعْضُکُمْ بَعْضاً إِنَّ عِيسَى ابْنَ مَرْيَمَ (ع) کَانَ مِنْ شَرَائِعِهِ السَّيْحُ فِي الْبِلَادِ فَخَرَجَ فِي بَعْضِ سَيْحِهِ وَ مَعَهُ رَجُلٌ مِنْ أَصْحَابِهِ قَصِيرٌ وَ کَانَ کَثِيرَ اللُّزُومِ لِعِيسَى ابْنِ مَرْيَمَ (ع) فَلَمَّا انْتَهَى عِيسَى إِلَى الْبَحْرِ قَالَ بِسْمِ اللهِ بِصِحَّةِ يَقِينٍ مِنْهُ فَمَشَى عَلَى ظَهْرِ الْمَاءِ فَقَالَ الرَّجُلُ الْقَصِيرُ حِينَ نَظَرَ إِلَى عِيسَى (ع) جَازَهُ بِسْمِ اللهِ بِصِحَّةِ يَقِينٍ مِنْهُ فَمَشَى عَلَى الْمَاءِ فَلَحِقَ بِعِيسَى (ع) فَدَخَلَهُ الْعُجْبُ بِنَفْسِهِ فَقَالَ هَذَا عِيسَى رُوحُ اللهِ يَمْشِي عَلَى الْمَاءِ وَ أَنَا أَمْشِي عَلَى الْمَاءِ فَمَا فَضْله
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Ref: www.Islamquest.net