That is the man whom we say yesterday. vs That is the man who we say yesterday.

Some examples from the web:

• He is the man whom we all respect.
• That is the man's true gesture, the only to be considered.
• That is the man who robbed me.
• That is the man we want.
• Because that is the man I am.
• Yes, that is the man's name.
• That is the man's true gesture, the only to be considered.
• That is the man you have made your life a shrine to.
• Yes, that is the man who beat me.
• It's like if I was really 26 and I could start all over, that is the man I'd be falling in love with.
• And that is the man I sold it to.
• Never forget, Charlie, that is the man you're competing with.
• That is the man I voted for.
• There is a proper order to things, and the man who resists that is the man who falls.
• That is our boy, he is the man that is going to stand up for British interests.
• Mr Tanner is sure that is the man?
• I'm trying to do the right thing because that is the man that I am today, with you.
• That is the man that the world has been waiting to see, walking strongly step by step further into freedom.
• Mr. President, the life lived by the bride beside the man whom, according to my esteemed colleague, she regained, is merely 6 months of marriage.
• So, the man whom Arkady dealt with, in Russia, until 1988, is named Konstantin Chernoff.

Some examples from the web:

• That is the man who robbed me.
• There is a proper order to things, and the man who resists that is the man who falls.
• Yes, that is the man who beat me.
• This is the man who can answer every single...
• This is the man who would abandon my wife.
• This is the man who came by yesterday morning.
• Your father is the man who has disappeared.
• Lieutenant Drones is the man who investigated the Prestige.
• EI is the man who tried to kill me.
• Teyla, this is the man who asked you to be his seventh wife.
• The problem is the man who ordered your father killed.
• Happy is the man who will possess her.
• This is the man who hates you.
• This is the man who tried to kill you.
• This is the man who sabotaged your radio room.
• My client is the man who was - wearing the leather jacket.
• This is the man who provided Fisk's lawyer with LAPD files.
• But worst is the man who avoids love.
• This is the man who hit me.
• - He is the man who ruined us.