1 Corinthians 14:26 provides the broader principle of orderly worship with each contributing; v.30 applies that to prophets yielding to a new revelation.

In 1 Cor 14:32, Paul states that prophets control their spirits — the explicit basis for yielding the floor in 14:30.

1 Corinthians 14:6 lists prophecy as a means of edification; the yielding in v.30 ensures that a new revelation benefits the church.

In 1 Cor 2:10, Paul explains that God reveals deep things by the Spirit — the source of the revelations that prompt interruptions in 1 Cor 14:30.

In 1 Thess 5:20, Paul commands not to despise prophecies — supporting the practice in 1 Cor 14:30 of yielding to a fresh revelation.