Matt 18:10
Take heed that ye despise not one of these little ones [a child of God]; for I say unto you, That in heaven their angels do always behold the face of my Father [waiting for His command to send them to your aid] which is in heaven.
Matt 26:53
Thinkest thou that I cannot now pray to my Father, and he shall presently give me more than twelve legions [1 legion= 6,000 soldiers, 6x12=72,000] of angels?
Heb 1:14
Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation?
Dan 9:20-22
20 And whiles I was speaking, and praying, and confessing my sin and the sin of my people Israel, and presenting my supplication before the LORD my God for the holy mountain of my God;
21 Yea, whiles I was speaking in prayer, even the man Gabriel, whom I had seen in the vision at the beginning, being caused to fly swiftly, touched me about the time of the evening oblation.
22 And he informed me, and talked with me, and said, O Daniel, I am now come forth to give thee skill and understanding.