Abdullah bin Umar reported,

The Messenger of Allah ﷺ said, "The keys of the unseen are five, known to none but Allah. No one knows what tomorrow will bring, no one knows what is in the wombs, no soul knows what it will earn tomorrow, no soul knows in what land it will die, and no one knows when the rain will come."

Azami 12310

Sahih

عن ابن عمر قال

قال رسول الله ﷺ: مفتاح الغيب خمس، لا يعلمها إلا الله. لا يعلم أحد ما يكون في غد، ولا يعلم أحد ما يكون في الأرحام، ولا تعلم نفس ماذا تكسب غدا، وما تدري نفس بأي أرض تموت، وما يدري أحد متى يجيء المطر.

الأعظمي 12310صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Tafsir of the great Quran
Chapter
Virtues of Surah Baqarah
Section
His saying, "And with Him are the keys of the unseen, none knows them except He. And He knows what is on the land and in the sea. Not a leaf falls but He knows it. And no grain is there within the darknesses of the earth and no moist or dry thing but that it is in a clear record"
Numbering
Jami al-Kamil 12310 (2nd edition)
Azami 12310