Qur'an 41:10

وَجَعَلَ فِيهَا رَوَٰسِىَ مِن فَوْقِهَا وَبَـٰرَكَ فِيهَا وَقَدَّرَ فِيهَآ أَقْوَٰتَهَا فِىٓ أَرْبَعَةِ أَيَّامٍ سَوَآءً لِّلسَّآئِلِينَ

He placed therein firm hills rising above it, and blessed it and measured therein its sustenance in four Days, alike for (all) who ask;