Allaah Ta3aalaa Says (translation of approximate meanings):
{Nor (is there blame) upon those who, when they came to you that you might give them mounts, you said: "I can find nothing for you to ride upon." They turned back while their eyes overflowed with tears out of grief that they could not find something to spend.} (at-Tawbah v. 92)
So their eyes overflowed with tears for not being able to join (due to lack of transportation) nor being able to financially support the Messenger, Sallallaahu Alayhi wa Sallam, and the Muslims at Taabook.
Are your eyes overflowing with tears brother?
If not, you should really evaluate your sincerity, and wake up when the Lord Comes down to the Lowest Heaven, and beg him in your Sujood to forgive you and make you a participant in His Cause.
