Explanation of the meaning of 'Umar's statement: "We seek nearness to You through our Prophet"

The questioner:
He says: Honorable Shaykh, may Allah grant you success, is the saying of 'Umar

The Shaykh:
And this will come, if Allah wills; the Shaykh will answer it. Yes.

The questioner:
He says: Is 'Umar's (may Allah be pleased with him) statement, "O Allah, when we were afflicted with drought, we sought nearness to You through our Prophet," not an oath by Allah using a created being, such that the preposition "bi" (through) is the preposition of oath?

The Shaykh:
That means you have not understood our speech from the beginning of the lesson until now. We say that this is not tawassul (seeking nearness to Allah through a means) through a created being, but tawassul through supplication. The evidence is that 'Umar said, "Stand up, O 'Abbas, and supplicate." So this is tawassul through the supplication of a created being, not through the created being himself, because he said, "Supplicate." Yes.