KJV:
Take ye heed, watch and pray: for ye know not when the time is.
NASB:
"Take heed, keep on the alert; for you do not know when the appointed time will come.
KJV:
Watch ye therefore, and pray always, that ye may be accounted worthy to escape all these things that shall come to pass, and to stand before the Son of man.
NASB:
"But keep on the alert at all times, praying that you may have strength to escape all these things that are about to take place, and to stand before the Son of Man."
KJV:
Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints;
NASB:
With all prayer and petition pray at all times in the Spirit, and with this in view, be on the alert with all perseverance and petition for all the saints,
KJV:
Obey them that have the rule over you, and submit yourselves: for they watch for your souls, as they that must give account, that they may do it with joy, and not with grief: for that is unprofitable for you.
NASB:
Obey your leaders and submit to them, for they keep watch over your souls as those who will give an account. Let them do this with joy and not with grief, for this would be unprofitable for you.