It is authentically related from the Prophet—may Allah bless him and grant him peace—that he saw Gabriel marshalling the ranks of the angels. Whenever the devils catch sight of the angels with whom Allah supports His servants, they flee; and Allah indeed strengthens His believing servants by means of His angels.

The Exalted said:

“When your Lord revealed to the angels, ‘I am with you, so give firmness to those who believe.’”

He also said:

“O you who believe, remember Allah’s favor upon you when hosts advanced against you, and We loosed against them a wind and forces you did not see.”

And He said:

“When he said to his companion, ‘Do not grieve; Allah is indeed with us.’ Then Allah sent down His serenity upon him and strengthened him with forces you did not see.”

And He said:

“When you said to the believers, ‘Is it not enough for you that your Lord should reinforce you with three thousand angels sent down?’ Yes indeed—if you remain steadfast and mindful of Allah and they come upon you suddenly, your Lord will reinforce you with five thousand”