'Siding' in the Bible

Then Saul became angry with Jonathan and shouted, “You son of a perverse and rebellious woman! Don’t I know that you are siding with Jesse’s son to your own shame and to the disgrace of your mother?

And some of the Gadites, siding with David, went to his strong place in the waste land, great and strong men, trained for war, expert in the use of arms, whose faces were like the faces of lions, and they were quick-footed like roes on the mountains;

Immediately they left their nets and followed Him [becoming His disciples, believing and trusting in Him and following His example].

Jesus called the crowd together with His disciples, and said to them, “If anyone wishes to follow Me [as My disciple], he must deny himself [set aside selfish interests], and take up his cross [expressing a willingness to endure whatever may come] and follow Me [believing in Me, conforming to My example in living and, if need be, suffering or perhaps dying because of faith in Me].

Peter started saying to Him, “Look, we have given up everything and followed You [becoming Your disciples and accepting You as Teacher and Lord].”

And he left everything behind and got up and began to follow Jesus [as His disciple].

He who is not with Me [believing in Me as Lord and Savior] is against Me [there is no impartial position]; and he who does not gather with Me [assisting in My ministry], scatters.

But the people of the city were divided, some siding with the Jews and some with the apostles.

whose fate is destruction, whose god is their belly [their worldly appetite, their sensuality, their vanity], and whose glory is in their shame—who focus their mind on earthly and temporal things.