I Samuel 12

​I Samuel 12:14:
  If ye will fear the LORD, and serve him, and obey his voice, and not rebel against the commandment of the LORD, then shall both ye and also the king that reigneth over you continue following the LORD your God:

I Samuel 12:22-23:
22 For the Lord will not forsake his people, for his great name’s sake, because it has pleased the Lord to make you a people for himself. 23 Moreover, as for me, far be it from me that I should sin against the Lord by ceasing to pray for you, and I will instruct you in the …

Intercessory prayer on behalf of the people of God was part of Samuel’s calling.