Acts 2:15

For these are not drunken, as ye suppose, seeing it is but the third hour of the day.

Cross-references

Acts 2:13 Historical context

Acts 2:13 contains the mockery 'They are filled with new wine' which Peter directly refutes by stating it's only the third hour—providing the immediate context.

1 Thessalonians 5:7 explicitly states 'those who get drunk, get drunk at night,' directly supporting Peter's claim that 9am is too early for drunkenness.