Then the king said to Ittai the Gittite, “Why do you also go with us? …But Ittai answered the king, “As the LORD lives, and as my lord the king lives, wherever my lord the king shall be, whether for death or for life, there also will your servant be.” – 2 Samuel 15:19,21

Canst thou lift thy hand to Christ, and say, “Henceforth I will live as Thy servant, not doing my own will, but Thy will; Thy command is henceforth my rule?” Canst thou say that? It involved, for Ittai, that he was to do his utmost for David’s cause, not to be his servant in name, but his soldier, ready for scars and wounds and death, if need be, on the king’s behalf. Now, if thou wouldst be Christ’s disciple, determine henceforth by His grace that thou wilt defend His cause; that if there be rough fighting, thou wilt be in it; and if there be a forlorn hope needed, thou wilt lead it, and go through floods and flames if thy Master’s cause shall call thee. Blessed is the man who will follow the Lamb whithersoever He goeth, giving himself wholly up to his Lord to serve Him with all his heart.

Ittai, in his promise, declared that he would give a personal attendance upon the person of his master. Brethren, let us make the same resolve in our hearts, that wherever Christ is, there we will be. Where is Christ? …Answer: in His church. The church is a body of faithful men; and where these are met together, there is Jesus in the midst of them…Where else did Jesus go? In the commencement of His ministry, He descended into the waters of baptism. Let us follow the Lamb whithersoever He goeth. At the close of His ministry, He brake bread, and said, “This do ye in remembrance of Me.” Be often at His table, for if there is a place on the earth where He manifests Himself to His children it is where bread is broken in His name…”Surely in what place my Lord the King shall be, whether it be in a prayer-meeting or at a sermon, even there also will thy servant be.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1512.cfm