Bereishit 1 goes into detail on when and how Hashem created various things in creation. One thing I notice though is that there is no specific detail on how or when water was created. It just sort of "shows up" after G-d creats the heavens and the earth and is never explained.
:בְּרֵאשִׁ֖ית בָּרָ֣א אֱלֹהִ֑ים אֵ֥ת הַשָּׁמַ֖יִם וְאֵ֥ת הָאָֽרֶץ: וְהָאָ֗רֶץ הָֽיְתָ֥ה תֹ֨הוּ֙ וָבֹ֔הוּ וְח֖שֶׁךְ עַל־פְּנֵ֣י תְה֑וֹם וְר֣וּחַ אֱלֹהִ֔ים מְרַחֶ֖פֶת עַל־פְּנֵ֥י הַמָּֽיִם
In the beginning, G-d created the heavens and the earth. And the earth was formless and void, and darkness covered the surface of the deep, and the spirit of G-d was hovering over the face of the water.
Where did the water come from?