Recorded in both Matthew 24:15-28 and Luke 17:22-37, the parable following a description given by Jesus of His second coming. When and where that is to happen He refuses to tell His disciples, but He assures them, that when it does happen it will be so evident that they will realize it of themselves, just as the eagles find by instinct and with their senses a carcass without further indication. Hence, there is no need to fear deception by false prophets, announcing the second coming of Christ; the very fact that this so-called Christ needs announcing is proof that he is not the true Christ. Let, them therefore live in peaceful preparation until they actually find themselves before their Lord and Master.
And he said to the disciples, "The days are coming when you will desire to see one of the days of the Son of man, and you will not see it. And they will say to you, `Lo, there!' or `Lo, here!' Do not go, do not follow them. For as the lightning flashes and lights up the sky from one side to the other, so will the Son of man be in his day. But first he must suffer many things and be rejected by this generation. As it was in the days of Noah, so will it be in the days of the Son of man. They ate, they drank, they married, they were given in marriage, until the day when Noah entered the ark, and the flood came and destroyed them all. Likewise as it was in the days of Lot -- they ate, they drank, they bought, they sold, they planted, they built, but on the day when Lot went out from Sodom fire and sulphur rained from heaven and destroyed them all - so will it be on the day when the Son of man is revealed. On that day, let him who is on the housetop, with his goods in the house, not come down to take them away; and likewise let him who is in the field not turn back. Remember Lot's wife. Whoever seeks to gain his life will lose it, but whoever loses his life will preserve it. I tell you, in that night there will be two in one bed; one will be taken and the other left. There will be two women grinding together; one will be taken and the other left."
And they said to him, "Where, Lord?"
He said to them, "Where the body is, there the eagles will be gathered together."
– Luke 17:22-37, Revised Standard Version
“So when you see the desolating sacrilege spoken of by the prophet Daniel, standing in the holy place (let the reader understand), then let those who are in Judea flee to the mountains; let him who is on the housetop not go down to take what is in his house; and let him who is in the field not turn back to take his mantle. And alas for those who are with child and for those who give suck in those days! Pray that your flight may not be in winter or on a sabbath. For then there will be great tribulation, such as has not been from the beginning of the world until now, no, and never will be. And if those days had not been shortened, no human being would be saved; but for the sake of the elect those days will be shortened. Then if any one says to you, `Lo, here is the Christ!’ or `There he is!’ do not believe it. For false Christs and false prophets will arise and show great signs and wonders, so as to lead astray, if possible, even the elect. Lo, I have told you beforehand. So, if they say to you, `Lo, he is in the wilderness,’ do not go out; if they say, `Lo, he is in the inner rooms,’ do not believe it. For as the lightning comes from the east and shines as far as the west, so will be the coming of the Son of man. Wherever the body is, there the eagles will be gathered together.
– Matthew 24:15-28, Revised Standard Version