'Remain' in the Bible

according as I did exhort thee to remain in Ephesus -- I going on to Macedonia -- that thou mightest charge certain not to teach any other thing,

and she shall be saved through the child-bearing, if they remain in faith, and love, and sanctification, with sobriety.

take heed to thyself, and to the teaching; remain in them, for this thing doing, both thyself thou shalt save, and those hearing thee.

And she who is really a widow and desolate, hath hoped upon God, and doth remain in the supplications and in the prayers night and day,