'Contend' in the Bible

And the Lord said to me, ‘Do not harass [the descendants of] Moab, nor provoke them to war, for I will not give you any of their land as a possession, because I have given Ar to the sons (Moab and Ammon) of Lot as a possession.’

‘Now arise, continue on, and go through the valley of the Arnon. Look, I have handed over to you Sihon the Amorite, king of Heshbon, and his land. Begin! Take possession [of it] and fight with him in battle.