Midrash for Pirkei Avot 5:3
עֲשָׂרָה נִסְיוֹנוֹת נִתְנַסָּה אַבְרָהָם אָבִינוּ עָלָיו הַשָּׁלוֹם וְעָמַד בְּכֻלָּם, לְהוֹדִיעַ כַּמָּה חִבָּתוֹ שֶׁל אַבְרָהָם אָבִינוּ עָלָיו הַשָּׁלוֹם:
Abraham, our father, was put to ten trials: [one — Ur Kasdim, where Nimrod cast him into the fiery furnace; two — "Go from your land"; three — "And there was a hunger"; four — "And the woman was taken to the house of Pharaoh"; five — the war of the kings; six — the covenant between the pieces, where he was shown the subjugation (of Israel) by the nations; seven — circumcision; eight — "And Avimelech sent and he took Sarah"; nine — "Drive out this maidservant and her son"; ten — the binding of Isaac], and he withstood them all, to apprise (men) of the great love of our father Abraham, may peace be upon him.
Pirkei DeRabbi Eliezer
OUR father Abraham was tried with ten trials, || and he stood firm in them all. The first trial was when our father Abraham was born; all the magnates of the kingdom and the magicians sought to kill him, and he was hidden under the earth for thirteen years without seeing sun or moon. After thirteen years he went forth from beneath the earth, speaking the holy language; and he despised idols and held in abomination the graven images, and he trusted in the shadow of his Creator, and said: "Blessed is the man who trusts in thee" (Ps. 84:12).