Job 39:28

“She dwelleth and abideth on the rock, upon the crag of the rock, and the strong place.] Where she and her young are safe: so Pliny f1434 says, eagles make their nests in rocks, even in the precipices of them, as the philosopher quoted in the preceding verse; and here on the tooth, edge, or precipice of the rock, which is inaccessible, and so like a strong fortified place.”

“abideth--securely (Psa 91:1); it occupies the same abode mostly for life. crag--literally, "tooth" (Sa1 14:5, Margin). strong place--citadel, fastness.”

“She dwelleth and abideth on the rock - “He rarely quits the mountains to descend into the plains. Each pair live in an insulated state, establishing their quarters on some high and precipitous cliff, at a respectful distance from others of the same species.” “Edin. Ency.” They seem to occupy the same cliff, or place of abode, during their lives; and hence, it is that they are represented as having a permanent abode on the lofty rock. In Damir it is said that the blind poet Besar, son of Jazidi, being asked, if God would give him the choice to be an animal, what he would be, said that he would wish to be nothing else than an “alokab,” a species of the eagle, for they dwelt in places to which…”

“upon: Sa1 14:4 Job 39:29”