Matthew 14:19

And bidding the multitudes to lie down on the grass, he took the five loaves and the two fishes, and, looking up to heaven, he blessed; and having broken the loaves he gave them to his disciples, and the disciples to the multitudes.

Romans 14:6

and he that regardeth not the day, to the Lord he doth not regard it. And he that eateth, eateth to the Lord, for he giveth thanks to God; and he that doth not eat, to the Lord he doth not eat, and giveth thanks to God.

John 6:23

(but there came other boats from Tiberias near the place where they ate the bread, when the Lord had given thanks;)

1 Corinthians 10:31

Whether therefore ye eat or drink, or whatever ye do, do all to the glory of God.

1 Thessalonians 5:18

in everything give thanks; for this is the will of God in Christ Jesus in regard to you.

1 Timothy 4:4-5

For every creature of God is good, and nothing to be refused, if it be received with thanksgiving;

Treasury of Scripture Knowledge

Summary

When thou hast eaten and art full, then thou shalt bless the LORD thy God for the good land which he hath given thee.

Bible References

Thou hast

Matthew 14:19
And bidding the multitudes to lie down on the grass, he took the five loaves and the two fishes, and, looking up to heaven, he blessed; and having broken the loaves he gave them to his disciples, and the disciples to the multitudes.
John 6:23
(but there came other boats from Tiberias near the place where they ate the bread, when the Lord had given thanks;)
Romans 14:6
and he that regardeth not the day, to the Lord he doth not regard it. And he that eateth, eateth to the Lord, for he giveth thanks to God; and he that doth not eat, to the Lord he doth not eat, and giveth thanks to God.
1 Corinthians 10:31
Whether therefore ye eat or drink, or whatever ye do, do all to the glory of God.
1 Thessalonians 5:18
in everything give thanks; for this is the will of God in Christ Jesus in regard to you.
1 Timothy 4:4
For every creature of God is good, and nothing to be refused, if it be received with thanksgiving;