1 Corinthians 10:2 KJV

And were all baptized unto Moses in the cloud and in the sea;
1 Corinthians 10:2, King James Version

In context

1 Moreover, brethren, I would not that ye should be ignorant, how that all our fathers were under the cloud, and all passed through the sea;

2 And were all baptized unto Moses in the cloud and in the sea;

3 And did all eat the same spiritual meat;