Hashem commanded Avraham to get a Bris Milah. On the third day he is in much pain and very weak. He was not able to go anywhere so he sat in the opening of his tent, hoping guest would arrive so he could do Hachnasas Orchim.
Avraham's Eighth Test
Avraham was sitting outside his tent when 3 men appear to him. Theses men were angels that Hashem sent. Being the best host he was, he ran inside and told his wife Sara to prepare a meal. While they were eating each " man" had breaking news to tell Avraham. The first one said your wife Sara will have a baby. The second one said Sedom will be destroyed and the last one said I am here to heal you .
Avraham Is Tested Again
I am sorry but you have to go
The angels went to Sedom. Lot invites them into his home. The angels told them that they must leave the city in order to be saved but they must not turn back to look at it being destroyed. However, Lot's wife looked back and was turned into a pillar or salt.
Avraham's Final Test
STOP don't do it this is a test from Hashem!
Hashem was testing Avraham. As his 8th test, while they where in G'rur, Sarah was taken by Avimelech. Avimelech had a dream that night, and and in his dream he saw that if he does return Sarah he will be punished. He gave Sarah back to Avraham! He passed his test!!
She is mine
Hashem was testing Avraham again. As his 9th test, he must send Hagar, his second wife, away because Sarah told Avraham that Hagar's son, Yishmael, was a bad influence on Sarah's son, Yitzchak. Again Avraham passed his test!
Hashem commanded Avraham to take his only son, Yitzchak and bring him as a korbon. Avraham listened to Hashem and prepared to bring Yitzchak. As Avraham was about to slaughter Yitzchak, he heard the voice of a malach saying that this was a test and not to kill him. Yay! Avraham passed his final test from Hashem!