At this place, the Holy Qur'an has particularly mentioned two attributes of these two elders: (1) الَّذِينَ يَخَافُونَ , that is, 'those who fear.' Not said here is as to who it is that they fear. The hint thus given is that there is only one Being in this whole world who deserves to be feared, that is, Allah Jalla Sha'nuhu, because He is the Absolute Master of this entire universe. No one can, without His will and permission, bring the least benefit to anyone, nor cause any harm - and when only one Being is deserving of being feared, and that is already determined, then, there remains no need to redetermine it.
The second attribute of these two elders pointed to by the Holy Qur'an is: (2): أَنْعَمَ اللَّـهُ عَلَيْهِمَا ، that is, 'Allah had blessed them.' The hint given here is that whoever has any excellence in him anywhere, that is nothing but the blessing and favour of Allah Ta` ala - otherwise, these twelve chiefs were all blessed with similar outward gifts of hands, feet, eyes and ears with reason and sense on the inside, along with the fortunate company of Sayyidna Musa They had all the strengths on their side, yet they all slipped except these two who stood firm on their commitment. This tells us that real guidance does not depend upon one's strength of inward and outward faculties or his effort or deed. Instead, it is a reward from Allah Ta` ala. However, to become de-serving of this reward, effort and deed are, no doubt, a condition.
The standard rule of conduct we learn from here is that a person whom Allah Ta` ala has blessed with reason, intelligence and smartness should not wax proud over these personal strengths while conducting the business of his life. The best course for him is to seek good guidance in all matters of his life from Allah alone.
In short, these two elders advised their people that they should not feel nervous about the apparent power of the Amalkites. If they would place their trust in Allah, just walk upto the gate of Baytul-Maqdis, victory shall be theirs. As for the decisive statement of these elders that once they reach the city gate, they will overcome and the enemy will run away defeated, it could have been based on a close assessment of the Amalkites, that they were, no doubt, unusually huge in built and strength, but were also weak at heart as a result of which, once they hear about the surprise attack, they would be unable to stay there.-And it is also possible that their total faith in the Divine decree which they had heard from Sayyidna Musa (علیہ السلام) as a glad tiding was the basis on which they said so.