When it was reported to Saul, he sent more messengers, but they prophesied too. So Saul sent messengers a third time, but they also prophesied.

Throughout the afternoon they were in an ecstatic frenzy, ¹  but there was no sound, no answer, and no response. ² 

And the Lord came down in the cloud and spoke to them, and he took some of the Spirit that was on Moses ¹  and put it on the seventy elders. When the Spirit rested on them, ²  they prophesied, ³  but did not do so again. ⁴ 

But two men remained in the camp; one’s name was Eldad, and the other’s name was Medad. And the spirit rested on them. (Now they were among those in the registration, ¹  but had not gone to the tabernacle.) So they prophesied in the camp.

So Saul sent messengers to capture David. When they saw a company of prophets prophesying with Samuel standing there as their leader, the spirit of God came upon Saul’s messengers, and they also prophesied.