"Count off seven sabbath years – seven times seven years – so that the seven sabbath years amount to a period of forty-nine years."
NIV
And you shall number seven sabbaths or weeks of years for you, seven times seven years, so the total time of the seven weeks of years shall be forty-nine years.
AMP
And thou shalt number seven sabbaths of years unto thee, seven times seven years; and the space of the seven sabbaths of years shall be unto thee forty and nine years.
KJV
"On the day of firstfruits, when you present to the LORD an offering of new grain during the Festival of Weeks, hold a sacred assembly and do no regular work."
NIV
Also in the day of the firstfruits, when you offer a cereal offering of new grain to the Lord at your Feast of Weeks, you shall have a holy [summoned] assembly; you shall do no servile work.
AMP
Also in the day of the firstfruits, when ye bring a new meat offering unto the LORD, after your weeks be out, ye shall have an holy convocation; ye shall do no servile work:
KJV
Then celebrate the Festival of Weeks to the LORD your God by giving a freewill offering in proportion to the blessings the LORD your God has given you.
NIV
Then you shall keep the Feast of Weeks to the Lord your God with a tribute of a freewill offering from your hand, which you shall give to the Lord your God, as the Lord your God blesses you.
AMP
And thou shalt keep the feast of weeks unto the LORD thy God with a tribute of a freewill offering of thine hand, which thou shalt give unto the LORD thy God, according as the LORD thy God hath blessed thee:
KJV