Answer:
Abraham, Isaac
Explanation:
According to Hebrews 11:19,
"Abraham reasoned that God could even raise the dead, and so in a manner of speaking he did receive Isaac back from death."
Depending on which version you're reading, it may state different things regarding what God was able to raise up.
According to the Berean Study Bible:
"Abraham reasoned that God could raise the dead, and in a sense, he did receive Isaac back from death."
New American Standard:
"He [abraham] considered that God is able to raise men even from the dead; from which he also received him [isaac] back as a type."