1 Corinthians 4:5
Therefore do not go on passing judgment before the time, but wait until the Lord comes who will both bring to light the things hidden in the darkness and disclose the motives of men’s hearts; and then each man’s praise will come to him from God. NASB
The mention in this verse of the Lord’s coming is in the context of the judgment of believers (1 Cor. 3:1-4:5). Here Paul has instructed the Corinthians not to pass judgment on each other, but to wait for His judgment when He comes. This is definitely referring to the Bema Seat judgment, which will occur immediately following the first phase of His coming—when those in Christ who are dead are resurrected and when those who are alive are raptured (1 Thess. 4:15-17).
We don’t know the exact time of this judgment; however, it seems to me from the way it is written here, that it will occur immediately after he comes to take us up. The judgment is very thorough; each man’s work (deeds) will become evident as to its quality (1 Cor. 3:13). And the testing (by fire) will reveal the most hidden things in the heart—that is, all of our inner motives, thoughts and attitudes will be revealed. This testing and judgment will determine our eternal standing and rewards (Rev. 22:12).