What is Pride as per Bible?

It’s Pride not allowing Jesus to serve you

Jesus washing our feet

John 13:8
New King James Version (NKJV)

⁸ Peter said to Him, “You shall never wash my feet!”

Jesus answered him, “If I do not wash you, you have no part with Me.”

Jesus serving in heaven

Revelation 1:13
New King James Version (NKJV)

¹³ and in the midst of the seven lamp stands One like the Son of Man, clothed with a garment down to the feet and girded about the chest with a golden band.