Pseudo Philo Biblical Antiquities 23:5
5 And when the people of the land were led astray, every man after his own devices, Abraham believed in me and was not led aside after them. And I saved him out of the fire and took him and brought him over into all the land of Chanaan. And I spake unto him in a vision saying: Unto thy seed will I give this land. And he said unto me: Behold now thou hast given me a wife and she is barren. And how shall I have seed of that womb that is shut up?
Neofiti Genesis 15:7
And Abram believed in the name of the Memra of the Lord and it was reckoned to him as righteousness. And he said to him: “I am the Lord who brought you out of the furnace of fire of the Chaldaeans to give you this land to inherit it.” And he said: ‘“I beseech by the mercies that are before you, how, I pray, will I know, that I shall inherit it?” And he said to him: “Sacrifice before me a heifer, three years old, a goat, three years old, and a ram, three years old, a turtle dove and the young of a pigeon.
Notes and References
"... This reasonable supposition (backed up by Isaiah 29:22) that the Chaldeans might have sought to harm Abraham because of his beliefs soon took on a new form. For, the city in which Abraham and his family lived was called Ur. But the word 'ur' in Hebrew had another meaning as well: 'fire' or 'flame.' Ancient readers of the Bible could not help concluding that this was no mere coincidence. And so, when God later says to Abraham: 'I am the Lord who took you out of [the] ur of the Chaldeans' many interpreters found in these words a hidden meaning, a hint about some fire or burning that had taken place in Ur and from which God had in fact saved Abraham, taking him from the midst of the flames ..."
Kugel, James L. The Bible as it Was (p. 143) Harvard University Press, 1998