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"If you help him (Muhammad sal-Allaahu 'alayhe wa sallam) not (it does not matter), for Allaah did indeed help him when the disbelievers drove him out, the second of two, when they (Muhammad sal-Allaahu 'alayhe wa sallam and Aboo Bakr radhiAllaahu'anhu) were in the cave, and he (SAW) said to his companion (Abu Bakr radhiAllaahu'anhu): "Be not sad (or afraid), surely Allaah is with us." Then Allaah sent down His Sakinah (calmness, tranquillity, peace, etc.) upon him, and strengthened him with forces (angels) which you saw not, and made the word of those who disbelieved the lowermost, while it was the Word of Allaah that became the uppermost, and Allaah is All-Mighty, All-Wise." [At-Taubah (9):40]

Narrated Abu Musa:

The Prophet said, "The example of guidance and knowledge with which Allah has sent me is like abundant rain falling on the earth, some of which was fertile soil that absorbed rain water and brought forth vegetation and grass in abundance. (And) another portion of it was hard and held the rain water and Allah benefited the people with it and they utilized it for drinking, making their animals drink from it and for irrigation of the land for cultivation. (And) a portion of it was barren which could neither hold the water nor bring forth vegetation (then that land gave no benefits). The first is the example of the person who comprehends Allah's religion and gets benefit (from the knowledge) which Allah has revealed through me (the Prophets and learns and then teaches others. The last example is that of a person who does not care for it and does not take Allah's guidance revealed through me (He is like that barren land.)" [The Book of Knowledge Volume 1, Book 3, Hadeeth 79]