Matthew 6:33
So, you should put the kingdom of God and what He says is right first [in your lives], then all these things [i.e., food, drink and clothing] will be provided for you.
Romans 11:16
And if the first part of the dough is dedicated to God, the entire batch of dough will be also. And if the roots [of a tree] are dedicated to God, the branches will be also.
1 Corinthians 15:20
But now Christ has been raised up from the dead; [He is] the firstfruits of those who have died. [Note: By "firstfruits" is meant the first installment of the crop which promises the entire harvest eventually].
James 1:18
It was God's purpose to bring us into being [spiritually] by the message of truth, so that we could become a kind of "firstfruits" of those He created. [Note: "Firstfruits" here suggests either that Christians are the best of all of God's creatures (Num. 18:12), or that they were the first to be converted, with many more to come].
Revelation 14:4
These people are the ones who did not practice sexual immorality with women, for they were virgins [Note: This probably has reference to people who avoided idolatry]. These are people who followed the Lamb wherever He went. They were purchased from among mankind to be the firstfruits [devoted] to God and to the Lamb.